Opioid research is one of the multidisciplinary research areas that involve advanced techniques ranging from molecular genetics to neuropharmacology, and from behavioral neuroscience to clinical medicine. In current opioid research, it has become increasingly important to use multiple approaches at molecular, cellular, and system levels for investigations on a specific opio- related target system. That often requires understanding and applying cro- field techniques and methods for the success of one s research projects. Through its broad spectrum of coverage, Opioid Research: Methods and...