Defining and identifying contextual factors within rheumatology: Protocol for semi-structures interviews of experts and Delphi surveys

Sabrina Mai Nielsen, Marianne Uggen Rasmussen, Maarten Boers, Maarten de Wit, Dorcas Beaton, Beverly Shea, Reuben Escorpizo, Daniel Furst, Karine Toupin April, Annelies Boonen, Marieke Scholte Voshaar, Barnaby Reeves, Lyn March, Peter Tugwell, Robin Christensen