PROTOCOL: Protocol for a systematic review: Interventions addressing men, masculinities and gender equality in sexual and reproductive health: An evidence and gap map and systematic review of reviews. Issue 1 (31st August 2018) - Ruane‐McAteer, Eimear; Hanratty, Jennifer; Lynn, Fiona; Reid, Esther; Khosla, Rajat; Amin, Avni; Lohan, Maria