Decision-making processes for essential packages of health services: experience from six countries - Rob Baltussen; Reza Majdzadeh; Karl Blanchet; Getachew Teshome Eregata; Alemayehu Hailu; Kjell Arne Johansson; Teri Reynolds; Manuel Carballo; Maryam Huda; Wajeeha Raza; Omar Mwalim; Mohamed Jama; et al. (BMJ Global Health, 2023)