Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KOINUMA Takuma and AKAZAWA Manabu,Validation of Epidemiological Methods for Studying the Infection Risk in Rheumatoid Arthritis with Methotrexate Combined Biologicals using Propensity Scores,Japanese Journal of Pharmacoepidemiology/Yakuzai ekigaku,13420445,Japanese Society for Pharmacoepidemiology,2021-06-20,26,1,27-40,https://cir.nii.ac.jp/crid/1390851784657708928,https://doi.org/10.3820/jjpe.26.e3