Additional file 1: of Risk of mortality among children, adolescents, and adults with autism spectrum disorder or attention deficit hyperactivity disorder and their first-degree relatives: a protocol for a systematic review and meta-analysis of observational studies Catalá-LópezFerrán HuttonBrian PageMatthew RidaoManuel DriverJane Alonso-ArroyoAdolfo Forés-MartosJaume Macías Saint-GeronsDiego VietaEduard ValenciaAlfonso Tabarés-SeisdedosRafael 2017 PRISMA-P checklist. (DOCX 24 kb)