Validity of diagnostic codes and prevalence of physician-diagnosed psoriasis and psoriatic arthritis in southern Sweden – a population-based register study
Löfvendahl S, Theander E, Svensson Å, Steen Carlsson K, Englund M and Petersson IF
PLoS ONE 2014; 9(5): 1-10
DOI: 10.1371/journal.pone.0098024
