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Gay C. Kitson, Richard D. Clark, Norman B. Rushforth, Paul M. Brinich, Howard S. Sudak, Stephen J. Zyzanski, Research on Difficult Family Topics: Helping New and Experienced Researchers Cope with Research on Loss, Family Relations, Vol. 45, No. 2 (Apr., 1996), pp. 183-188
Kitson et al. (Mon,) studied this question.