Effects of Belladonna 12 CH and 30 CH in healthy volunteers. A multiple, single-case experiment in randomization design - Walach, H.; Hieber, S.; Ernst-Hieber, E (Sings and Images Selected Papers from the 7th and 8th GIRI Meeting, held in Montpellier, France, Nov 20–21, 1993, and Jerusalem, Israel, Dec 10–11, 1994, 1997)