https://www.selleckchem.com/pr....oducts/homoharringto 
  Objectives The aims of the present study were to clarify the time-course of olfactory recovery and the prognostic factors in PIOD patients treated with Toki-shakuyaku-san (TSS). Methods A retrospective cohort study of patients with PIOD was conducted by reviewing patients' medical records. This study included patients who received TSS or a combination of TSS and zinc sulfate. Olfactory function was examined by TT olfactometer at each 3-monthly follow-up visit. Patients with normal and mild olfactory dysfunction were exclu
 
					 
						 
                                     
				    				