‐  ‐   
Myalgia or arthralgia  Cross‐sectional  Primary care  ‐  ‐  ‐   
Hospital outpatient clinics  4/339  0.19 to 0.86  0.45 to 0.91  2/4/1/2
Hospital inpatientsa  ‐  ‐  ‐   
Case‐control  Prim