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Citlalli grabs the lock installed on the refrigerator at her home in Mexico City, Mexico on July 18, 2017. Because of her condition, her mother keeps...

Citlalli kisses her cat at her home in Mexico City, Mexico on July 18, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican girl, lives with her 4...

Citlalli stands in front of the door to her home in Mexico City, Mexico on July 18, 2017. When she is excited, she rubs her palms together. Delia Citl...

Citlalli grabs the door of the refrigerator before her mother can lock it shut at their home in Mexico City, Mexico on July 18, 2017. Because of Citla...

Citlalli stands in front of the door to her home in Mexico City, Mexico on July 18, 2017. When she is excited, she rubs her palms together. Delia Citl...

Citlalli wears a medical ID necklace etched with her name, phone number, blood type and status as a diabetic in Mexico City, Mexico on July 18, 2017....

Close-up of Citlalli's arms at her home in Mexico City, Mexico on July 18, 2017. Many people with Prader-Willi Syndrome (PWS) frequently engage in sev...

Citlalli is photographed outside her front door in Mexico City, Mexico on July 18, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican girl, live...

Citlalli eats rice pudding while her mother clips her nails at their home in Mexico City, Mexico on July 18, 2017. Delia Citlalli Pineda Corzo, a 21-y...

Citlalli's mother applies a healing cream to Citlalli's wounds at their home in Mexico City, Mexico on July 18, 2017. Many people with Prader-Willi Sy...

Citlalli wears a medical ID necklace etched with her name, phone number, blood type and status as a diabetic in Mexico City, Mexico on July 18, 2017....

Citlalli's mother applies a healing cream to Citlalli's wounds at their home in Mexico City, Mexico on July 18, 2017. Many people with Prader-Willi Sy...

Citlalli is photographed outside her front door in Mexico City, Mexico on July 18, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican girl, live...

Citlalli grabs the lock installed on the refrigerator at her home in Mexico City, Mexico on July 18, 2017. Because of her condition, her mother keeps...

Citlalli grabs the door of the refrigerator before her mother can lock it shut at their home in Mexico City, Mexico on July 18, 2017. Because of Citla...

A lock installed on the refrigerator at Citlalli's home in Mexico City, Mexico on July 18, 2017. Because of her condition, her mother keeps the refrig...

Citlalli eats rice pudding while her mother clips her nails at their home in Mexico City, Mexico on July 18, 2017. Delia Citlalli Pineda Corzo, a 21-y...

Citlalli watches television at her home in Mexico City, Mexico on July 18, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican girl, lives with h...

Citlalli watches television at her home in Mexico City, Mexico on July 18, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican girl, lives with h...

Citlalli grabs the door of the refrigerator before her mother can lock it shut at their home in Mexico City, Mexico on July 18, 2017. Because of Citla...

Citlalli grabs the door of the refrigerator before her mother can lock it shut at their home in Mexico City, Mexico on July 18, 2017. Because of Citla...

Citlalli stands in front of the door to her home in Mexico City, Mexico on July 18, 2017. When she is excited, she rubs her palms together. Delia Citl...

Citlalli eats rice pudding while her mother clips her nails at their home in Mexico City, Mexico on July 18, 2017. Delia Citlalli Pineda Corzo, a 21-y...

Citlalli dances with Danzantes in the Zocalo main square in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican g...

Citlalli dances with Danzantes in the Zocalo main square in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican g...

Citlalli prays at the?Metropolitan Cathedral of the Assumption in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mex...

Citlalli buys an ice cream at a McDonald's on the Zocalo main square in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda Corzo, a 21-year-o...

Citlalli embraces a man wearing an Iron Man suit on the streets of the Historic Center in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda...

Citlalli eats an ice cream with her grandmother, Cristina Zarate, in the Historic Center in Mexico City, Mexico on July 15, 2017. Citlalli spends one...

Citlalli eats an ice cream with her grandmother, Cristina Zarate, in the Historic Center in Mexico City, Mexico on July 15, 2017. Citlalli spends one...

Citlalli kisses a photo of her deceased grandfather on her grandmother's cellphone at the?Metropolitan Cathedral of the Assumption in Mexico City, Mex...

Citlalli dances with Danzantes in the Zocalo main square in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican g...

Citlalli prays at the?Metropolitan Cathedral of the Assumption in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mex...

Citlalli eats an ice cream with her grandmother, Cristina Zarate, in the Historic Center in Mexico City, Mexico on July 15, 2017. Citlalli spends one...

Citlalli buys an ice cream at a McDonald's on the Zocalo main square in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda Corzo, a 21-year-o...

Citlalli embraces her grandmother, Cristina Zarate, at the?Metropolitan Cathedral of the Assumption in Mexico City, Mexico on July 15, 2017. Citlalli...

Citlalli eats an ice cream on the streets of the Historic Center in Mexico City, Mexico on July 15, 2017. Citlalli spends one day a week with her gran...

Citlalli dances with Danzantes in the Zocalo main square in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican g...

Citlalli dances with Danzantes in the Zocalo main square in Mexico City, Mexico on July 15, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican g...

Citlalli eats an ice cream with her grandmother, Cristina Zarate, in the Historic Center in Mexico City, Mexico on July 15, 2017. Citlalli spends one...

Citlalli eats an ice cream with her grandmother, Cristina Zarate, in the Historic Center in Mexico City, Mexico on July 15, 2017. Citlalli spends one...

Citlalli looks through the bars of the locked kitchen door at her home in Mexico City, Mexico on June 1, 2017. Because of her condition, her mother ke...

Citlalli grabs the door of the refrigerator before her mother can lock it shut at their home in Mexico City, Mexico on June 1, 2017. Because of Citlal...

Citlalli grabs the door of the refrigerator before her mother can lock it shut at their home in Mexico City, Mexico on June 1, 2017. Because of Citlal...

Citlalli and her mother photographed at their home in Mexico City, Mexico on June 1, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican girl, li...

Citlalli grabs the door of the refrigerator before her mother can lock it shut at their home in Mexico City, Mexico on June 1, 2017. Because of Citlal...

Citlalli grabs the door of the refrigerator before her mother can lock it shut at their home in Mexico City, Mexico on June 1, 2017. Because of Citlal...

Citlalli's mother clips her nails at their home in Mexico City, Mexico on June 1, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican girl, lives...

Citlalli photographed at her home in Mexico City, Mexico on June 1, 2017. Delia Citlalli Pineda Corzo, a 21-year-old Mexican girl, lives with her 42-y...

Jorge is prepped to undergo a polysomnographic examination?at the Salvador Zubir?n National Institute of Health Sciences and Nutrition in Mexico City,...