Effective SLOPE EffectS of Lifestyle interventions in Older PEople with obesity: a systematic review and network meta-analysis protocol - Torbahn, Gabriel; Schoene, Daniel; Schwingshackl, Lukas; Rücker, Gerta; Knüttel, Helge; Kemmler, Wolfgang; Sieber, Cornel C.; Batsis, John A.; Villareal, Dennis T.; Stroebele-Benschop, Nanette; Volkert, Dorothee; Kiesswetter, Eva (Friedrich-Alexander-Universität Erlangen-Nürnberg, 2020)