TY - JOUR T1 - Challenges, facilitators and barriers to screening study participants in early disease stages-experience from the MACUSTAR study JO - BMC Medical Research Methodology PY - 2021/03/17 AU - Terheyden JH AU - Behning C AU - Lüning A AU - Wintergerst L AU - Basile PG AU - Tavares D AU - Melício BA AU - Leal S AU - Weissgerber G AU - Luhmann UFO AU - Crabb DP et al ED - DO - DOI: 10.1186/s12874-021-01243-8 PB - Springer Science and Business Media LLC VL - 21 Y2 - 2024/12/20 ER -