Challenges in Collecting Patient Characteristics for Analysis using Linked Data. - Benedikt Kämpgen; Keno März; Mohammadreza Hafezi; Alfred Adler; Patrick Philipp 002; Sascha Zelzer; Arash Saffari; Marco Nolden; Arianeb Mehrabi; Lena Maier-Hein; Achim Rettinger (CURAC, 2014)