Characteristics of all Covariates Before and After Propensity Score Matching during Heparin Contamination. PS indicates propensity score; n, number of patients; %, number of patients in percent of tot
Unsolicited adverse events were recorded on days 0, 1, 2, 7, 14 and 28 after each immunization. Severity classification: (a) bruising at the injection site: Gr1 = <5 cm in diameter; (b) all other sign
