Dine JL, Austin MK, Armer JM. Nursing education on lymphedema self-management and self-monitoring in a South African oncology clinic. J Cult Divers. 2011;18(4):126-8.
Williams VSL. The "unbiased" anchor: bridging the gap between DIF and item bias. Appl Meas Educ. 1997;10(3):253-67. doi: 10.1207/s15324818ame1003_4