How to automatically turn patient experience free-text responses into actionable insights: a natural language programming (NLP) approach. - Simone A. Cammel; Marit S. De Vos; Daphne van Soest; Kristina M. Hettne; Fred Boer; Ewout W. Steyerberg; Hileen Boosman (BMC Medical Informatics Decis. Mak., 2020)