“…The main characteristics of the included studies on atopic disorders are summarized in Supplementary Table S1 . There were 20 prospective [ 30 , 50–52 , 57–61 , 63–65 , 69 , 70 , 72 , 74–78 ] and 11 retrospective [ 53–56 , 62 , 67 , 68 , 71 , 73 , 79 ] studies with publication periods ranging from 2005 to 2020 and baseline study periods ranging from 1959 to 2018. The number of participants varied greatly, from 198 [ 61 ] to 792,130 [ 68 ] children.…”