Questionnaire survey 29(24.6) 28(32.2)
Mail survey 31(26.3) 15(17.2)
Personal in-depth interview 34(28.8) 6(6.9)
Focus group interview 1(0.8) 3(3.4)
Nursing intervention 3(2.5) 8(9.2)
Program development 2(1.7) 3(3.4)
Analysis of nursing records 5(4.3) 12(13.8)
Secondary analysis 11(9.3) 3(3.4)
Expert opinions 1(0.8) 8(9.2)
Others 1(0.8) 1(1.2) Total