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Amrein, Melanie Alexandra; Ruschetti, Gian Giacomo; Baeder, Carole; Bamert, Melanie; Inauen, Jennifer (2022). Mobile intervention to promote correct hand hygiene at key times to prevent COVID-19 in the Swiss adult general population: study protocol of a multiphase optimisation strategy. BMJ open, 12(3), e055971. BMJ Publishing Group 10.1136/bmjopen-2021-055971
