How much loading does the water resistance therapy pose on the vocal folds?

LAUKKANEN, A.M., GENEID, A., BULA, Vítězslav, RADOLF, Vojtěch, HORÁČEK, Jaromír. How much loading does the water resistance therapy pose on the vocal folds? In: MA, E., YIU, E., eds. AQL 2017 The 12th International Conference on advances in quantitative laryngology, voice and speech research. Hong Kong, 2017, s. 1.