G6PD and Schnyder corneal dystrophy: As for chronic diseases, 22 (7.8%) had glucose-6-phosphate dehydrogenase (G6PD) deficiency, eight (2.8%) had hypothyroidism, and two (0.7%) had autism spectrum disorder (ASD), two (0.7%) had celiac disease, and two (0.7%) had sickle cell disease (SCD).