@ARTICLE{
author={Voormolen Daphne C,Haagsma Juanita A,Polinder Suzanne,Maas Andrew IR,Steyerberg Ewout W,Vulekovic Petar,Sewalt Charlie A,Gravesteijn Benjamin Y,Covic Amra,Andjelic Nada,Plass Anne Marie,Von Steinbuechel Nicole},
year={2019},
title={Post-Concussion Symptoms in Complicated vs. Uncomplicated Mild Traumatic Brain Injury Patients at Three and Six Months Post-Injury: Results from the CENTER-TBI Study},
journal={JOURNAL OF CLINICAL MEDICINE},
volume={8},
number={11},
pages={-},
document_type={Article},
} 

@ARTICLE{
author={Brankovic Milos,Kardys Isabella,Steyerberg Ewout W,Lemeshow Stanley,Markovic Maw,Rizopoulos Dimitris,Boersma Eric},
year={2019},
title={Understanding of interaction (subgroup) analysis in clinical trials},
journal={EUROPEAN JOURNAL OF CLINICAL INVESTIGATION},
volume={49},
number={8},
pages={-},
document_type={Review},
}