Metaxas, Corina, Deborah Mathis, Cyrill Jeger, Kurt E. Hersberger, Isabelle Arnet, and Philipp Walter. 2017. “Early Biomarker Response and Patient Preferences to Oral and Intramuscular Vitamin B12 Substitution in Primary Care: A Randomised Parallel-Group Trial”. Swiss Medical Weekly 147 (1314):w14421. https://doi.org/10.4414/smw.2017.14421.