Kejkornkaew, Siranee, Yupapin Sirapo-ngam, Supreeda Monkong, Tiraporn Junda, and Margaret I. Wallhagen. 2016. “A Grounded Theory Study of the Quality Relationships Between Family Caregivers and Persons With Head and Neck Cancer”. Pacific Rim International Journal of Nursing Research 20 (2):161-73. https://he02.tci-thaijo.org/index.php/PRIJNR/article/view/39281.