[1] Blankenstein Hosp, Dept Naturopathy, Hattingen, Germany
[2] Natl Bogomolets Med Univ, Dept Pediat 4, Bogomolets, Ukraine
[3] 3Int Hlth Ctr, Ctr Hlth, The Hague, Netherlands
[4] Univ Nis, Clin Ctr, Fac Med, Nish, Serbia
[5] Univ Padua, Dept Paediat, Padua, Italy
[6] Univ Hosp Tsaritsa Yoana, Dept Otorhinolaryngol Audiol & Otoneurol, Sofia, Bulgaria
[7] Vilnius Univ Children Hosp, Paediat, Vilnius, Lithuania
[8] Shaare Zedek Med Ctr, Integrat Complementary Med, Ctr Integrat Complementary Med, Jerusalem, Israel