Original article
A registry-based analysis
Dtsch Arztebl Int 2018; 115: 385-92. DOI: 10.3238/arztebl.2018.0385
Correspondence
Dtsch Arztebl Int 2009; 106(23): 394. DOI: 10.3238/arztebl.2009.0394b
Original article
Dtsch Arztebl Int 2008; 105(42): 725-32. DOI: 10.3238/arztebl.2008.0725