Second cancer risk after 3D-CRT, IMRT and VMAT for breast cancer - Abo-Madyan, Yasser; Schneider, Frank; Sperk, Elena; Clausen, Sven; Giordano, Frank Anton; Herskind, Carsten; Steil, Volker; Wenz, Frederik; Glatting, Gerhard (Radiotherapy and oncology, 2014)