Original sentence: Lisa Littman, as an adjunct assistant professor at the Icahn School of Medicine at Mount Sinai, created the term based on an online survey of parents on three anti-transgender websites who believed that their teenage children had suddenly manifested symptoms of gender dysphoria and begun identifying as transgender simultaneously with other children in their peer group
Edited sentence: Lisa Littman, as an adjunct assistant professor at the Icahn School of Medicine at Mount Sinai, created the term based on an online survey of parents on two anti-transgender and one other website who believed that their teenage children had suddenly manifested symptoms of gender dysphoria and begun identifying as transgender simultaneously with other children in their peer group