The need of a taxonomy. Bonica, J J Pain, 6(3):247–248, 1979.
The need of a taxonomy. [link]Paper  bibtex   
@article{bonica_need_1979,
	title = {The need of a taxonomy.},
	volume = {6},
	url = {http://linkinghub.elsevier.com/retrieve/pii/0304395979900460},
	number = {3},
	journal = {Pain},
	author = {Bonica, J J},
	year = {1979},
	pmid = {460931},
	pages = {247--248},
}

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