Correction to: Two Randomized Controlled Trials of Bacillus Calmette-Guérin Vaccination to reduce absenteeism among health care workers and hospital admission by elderly persons during the COVID-19 pandemic: A structured summary of the study protocols for two randomised controlled trials
Trials. 2020 Jun 22;21(1):555.
doi: 10.1186/s13063-020-04521-w.