The effect of additional protein on lean body mass preservation in post-bariatric surgery patients: a systematic review. - Romeijn, Marleen M.; Holthuijsen, Daniëlle D. B.; Kolen, Aniek M.; Janssen, Loes; Schep, Goof; van Dielen, François M. H.; Leclercq, Wouter K. G. (Nutrition Journal, 2021)