International quality of life assessment (IQOLA) project - Aaronson, N. K.; Acquadro, C.; Alonso, J.; Apolone, G.; Bucquet, D.; Bullinger, M.; Bungay, K.; Fukuhara, S.; Gandek, B.; Keller, S.; Razavi, D.; Sanson-Fisher, R.; et al. (Springer, 1992)
http://dx.doi.org/10.1007/BF00434949
Keywords: WW-YZ