A Mobile Exposure Chamber for Challenge Tests to the Human Respiratory Tract

Multiple chemical sensitivities: A systematic review of provocation studies

“…20 Studies were categorized by the quality of blinding used: double-or single-blind studies that also included an odorous masking agent to prevent identification of the stimuli (Table I), [21][22][23][24][25][26] double-blind studies without masking (Table II), 11,12,[15][16][17][18][19][27][28][29][30][31][32] single-blind studies without masking (Table III), 13,14,[33][34][35][36][37][38][39][40][41][42][43][44] and open-label studies or studies with unclear blinding (see Table E1 in the Online Repository at www.jacionline.org). 10,[45][46][47] Studies using olfactory masking agents or nose clips Three studies testing 70 chemically sensitive participants incorporated blinding and an olfactory mask and failed to show any significant effects on subjects with MCS after provocation with chemicals.…”