Factors affecting COVID-19 vaccine hesitancy among healthcare providers in 23 countries. - Leigh, Jeanna Parsons; Moss, Stephana J.; White, Trenton M.; Picchio, Camila A.; Rabin, Kenneth H.; Ratzan, Scott C.; Wyka, Katarzyna; El-Mohandes, Ayman; Lazarus, Jeffrey V. (Vaccine, 2022)