Authors: Eija Kalso; Laurie Allan; Paul L I Dellemijn; Clara C Faura; Wilfried K Ilias; Troels S Jensen; Serge Perrot; Leon H Plaghki; Michael Zenz Journal: Eur J Pain Date: 2003 Impact factor: 3.931
Authors: Bridget A Martell; Patrick G O'Connor; Robert D Kerns; William C Becker; Knashawn H Morales; Thomas R Kosten; David A Fiellin Journal: Ann Intern Med Date: 2007-01-16 Impact factor: 25.391