Developing the RIGHT-COI&F extension for the reporting conflicts of interest and funding in practice guidelines: study protocol - Xun, Yangqin; Estill, Janne; Ren, Mengjuan; Wang, Ping; Yang, Nan; Wang, Zijun; Zhu, Ying; Su, Renfeng; Chen, Yaolong; Akl, Elie A. (Annals of Translational Medicine, 2022)