2nd International WALED Congress (World Academy for Laser Education in Dentistry) for graduates and alumni of Master of Science (M.Sc.) and Mastership / Fellowship programs of RWTH Aachen University in the field of lasers in dentistry : 1-2 May 2014 Forum M, Aachen, Germany Congress Chairman: Prof. Dr. Norbert Gutknecht. (Lasers in Medical Science, 2014)