title: How many risks-of-bias and comorbidity scales do we need?
authors: Peter
authors: P
authors: Tugwell
authors: André
authors: A
authors: Knottnerus
authors: Leanne
authors: L
authors: Idzerda
mesh_terms: D015982:Bias; D015897:Comorbidity; D004812:Epidemiologic Methods; D006801:Humans; D011237:Predictive Value of Tests