Associations of lockdown stringency and duration with Google searches for mental health terms during the COVID-19 pandemic: A nine-country study

de la Rosa, Pedro A. ✉; Cowden, Richard G.; de Filippis, Renato; Jerotic, Stefan; Nahidi, Mahsa; Őri, Dorottya [Őri, Dorottya (Gyermek- és ifjús...), szerző] Magatartástudományi Intézet (SE / AOK / I); Orsolini, Laura; Nagendrappa, Sachin; Pinto da Costa, Mariana; Ransing, Ramdas; Saeed, Fahimeh; Shoib, Sheikh; Turan, Serkan; Ullah, Irfan; Vadivel, Ramyadarshni; Ramalho, Rodrigo