Table 2. The commonest medical specialties contributing to the total number of studies including placebo (they represent 72.8% of the total number of studies including placebo).

Medical specialty	n (%)
Oncology	54 (15.0)
Cardiology	51 (14.2)
Neurology	47 (13.1)
Digestive	27 (7.5)
Pulmonology	22 (6.1)
Rheumatology	22 (6.1)
Nephrology	20 (5.6)
Dermatology	12 (3.3)
Psychiatry	12 (3.3)
Clinical Pharmacology	10 (2.8)
Infectious Diseases	10 (2.8)
Total	287 (79.8)
Others	72 (20.2)
	359 (100)