Factors associated with hospitalization for seasonal influenza in MoroccoHind Ezzine, Zakia Regragui, Imad Cherkaoui, Mariam Naciri, Abdelkarim Filali-Maltouf, Ahmed Rguig, Soumia Triki, Amgad Elkholy, Abderrahman Bimouhen, Fatima Falaki, Hassan Ihazmad, Touria Benamar, Hicham Oumzil and Mohammed Youbi