@incollection{Naz17, author = {Mohammad Saleem and Huma Naz}, title = {Analgesics: New Target and Sources}, booktitle = {Pain Relief}, publisher = {IntechOpen}, address = {Rijeka}, year = {2017}, editor = {Cecilia Maldonado}, chapter = {16}, doi = {10.5772/67853}, url = {https://doi.org/10.5772/67853} }