Hannouf MB,  Winquist E,  Mahmud SM,   Brackstone M,  Sarma S,  Rodrigues G,  Rogan PK,  Hoch JS, Zaric GS.  The clinical and economic impact of primary tumour identification in metastatic cancer of unknown primary tumour: a population-based retrospective matched cohort study, PharmacoEconomics, 2017 (doi:10.1007/s41669-017-0051-2)  Link:  pdf

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