Zech ea 1995
Zech D.F., Grond S., Lynch J., Hertel D., Lehmann K.A. Validation of World Health Organization Guidelines for cancer pain relief: a 10-year prospective study. Pain. 1995. Vol. 63. * 1. P. 65-76.
Zech D.F., Grond S., Lynch J., Hertel D., Lehmann K.A. Validation of World Health Organization Guidelines for cancer pain relief: a 10-year prospective study. Pain. 1995. Vol. 63. * 1. P. 65-76.
