The study did not have a protocol. The baseline data collection for this study did not require ethical approval. For the follow-up mortality data collection, we received a statement from the ethics committee of the University Medicine Greifswald stating that it had no objections (Ethics statement number: BB044/13, 02.05.2013).
John U, Rumpf H-J, Hanke M, Meyer C (2021) Alcohol abstinence and mortality in a general population sample of adults in Germany: A cohort study. PLoS Med 18(11): e1003819. https://doi.org/10.1371/journal.pmed.1003819