CDC:10.3200/AEOH.59.1.37-41 CDC:10.3200/AEOH.60.1.7-15 CDC:10.3200/AEOH.60.1.40-43 CDC:10.3200/AEOH.60.3.119-127 CDC:10.3200/AEOH.60.3.130-139 CDC:10.3200/AEOH.60.4.195-204 CDC:10.3200/AEOH.61.3.101-108 CDC:10.3200/BMED.34.2.45-54 CDC:10.3200/JACH.55.3.175-180 CDC:10.3200/JACH.56.2.119-128