Graham J, Earnshaw S, Lim J, Luthra R, Borker R. Cost-effectiveness of afatinib versus erlotinib in the first-line treatment of patients with metastatic non-small cell lung cancer with EGFR Exon 19 deletion mutations. JCP. 2016 May;2(4):31-9.
Gray-Little B, Williams VSL, Hancock TD. An item response theory analysis of the Rosenberg self-esteem scale. Pers Soc Psychol Bull. 1997;23(5):443-51. doi: 10.1177/0146167297235001