Study	Reason for exclusion
Ardia 1985	cross‐over study with no data divided for each arm
Battaglia 1990	controlled study vs another active drug
Battaglia 1995b	preliminary data of another included study
Bente 1979	controlled study vs dihydroergotoxin‐mesylate
Bernini 1977	not a controlled study
Blaha 1979	clinical study with geriatric patients with transitory cognitive and behavioural deficits
Brambilla 1978	controlled study between three different dosage of nicergoline
Cascone 1978	data not available in numerical form
Crook 1997a	not clinical study
Crook 1997b	preliminary results of another included study
Dauverchain 1979	not controlled study. Chronic cerebrovascular insufficiency
Efimov 1991	not controlled clinical study, Diabetic patients
Fabbrini 1995	not controlled study
Gara 1993	controlled study vs pentoxifylline in cerebral atherosclerosis patients
Guardamagna 1972	not controlled study
Iliff 1979	not controlled study. Blood flow in patients with cerebrovascular disease
Kaemmerer 1980	not controlled study
Kobayashi 1992	not controlled study
Kugler 1984	not controlled study
Kugler 1985	controlled study vs dihydroergotamine mesilate in patients with cerebral insufficiency
Kugler 1990	clinical study on normal subjects taking barbiturates
Ladurner 1991	controlled clinical study vs co‐dergocrine mesilate in patients with multinfarct dementia
Maiolo 1972	not controlled study
Man'kovskii 1989a	controlled study vs prostacyclin in brain hypoxia
Man'kovskii 1989b	not controlled study
Marolda 1978	controlled study vs eburnamonine
Michelangeli 1975	clinical study performed with chronic cerebrovascular patients included without a formal assessment of cognitive deficits but on the basis only of clinical signs of vascular pathology
Miletto 1976	not controlled study
Moglia no year	a review of different studies
Montanini 1973	not controlled study
NCSG 1990	controlled study vs ergoloid mesylates
Nico 1981	controlled study vs papaveroline on cerebral ischaemic vasculopathy
no author 1989	data presented in another included study
Ohtomo 1986a	controlled study vs Ca‐hopantenate
Ohtomo 1986b	controlled study vs Hydergine
Ohtomo 1986c	not controlled study
Prencipe 1974	not controlled study
Saletu 1979a	multiple treatments controlled study run in a cross‐over fashion with each patient taking all different treatments at different periods of the observation
Saletu 1980	review with no data in numerical format
Saletu 1987	controlled study vs a different dosage of nicergoline
Saletu 1996a	same data of another included study
Saletu 1996b	same data of another included study
Saletu 1997	same data of another included study
Samso 1979	not controlled neurophysiological study on patients with chronic cerebrovascular disorders
Schneider 1994	controlled study vs antagonic‐stress
Shtok 1985	controlled study vs dihydroergotoxin on cerebral haemodynamics of patients with acute and chronic cerebrovascular diseases
Toni 1973	not controlled study
Vesel'skii 1991	not placebo controlled clinical study
Vesel'skii 1992	not placebo controlled clinical study
Winblad 2000	not a clinical study, a review