Reich, A., Heisig, M., Quan Phan, N., Taneda, K., Takamori, K., Takeuchi, S., … Szepietowski, J. C. (2011). Visual Analogue Scale: Evaluation of the Instrument for the Assessment of Pruritus. Acta Dermato-Venereologica, 92(5), 497–501. https://doi.org/10.2340/00015555-1265