Kirkdale, R; Krell, J; O'Hanlon Brown, C; Tuthill, M; Waxman, J (2010). "The cost of a QALY". QJM: Monthly Journal of the Association of Physicians. 103 (9): 715–720. doi:10.1093/qjmed/hcq081. PMID20519275. Retrieved 27 May 2021.
Kirkdale, R; Krell, J; O'Hanlon Brown, C; Tuthill, M; Waxman, J (2010). "The cost of a QALY". QJM: Monthly Journal of the Association of Physicians. 103 (9): 715–720. doi:10.1093/qjmed/hcq081. PMID20519275. Retrieved 27 May 2021.
Kirkdale, R; Krell, J; O'Hanlon Brown, C; Tuthill, M; Waxman, J (2010). "The cost of a QALY". QJM: Monthly Journal of the Association of Physicians. 103 (9): 715–720. doi:10.1093/qjmed/hcq081. PMID20519275. Retrieved 27 May 2021.