By Maria Caspani (Reuters) – Oklahoma Governor Kevin Stitt on Wednesday signed a Republican-backed bill banning transgender athletes from girls’ school sports, adding to a list of states that have passed or enacted similar laws. “We are protecting women’s sports, we’re ensuring a level playing field for female athletes,” Stitt, a Republican, said at a signing ceremony, surrounded by young female athletes. The so-called Save Women’s Sports Act applies to public schools in the state through college. Oklahoma joined 12 other states that have enacted legislation prohibiting transgender girls from …