[The necessity of electronically updated meta-analyses: Doppler ultrasound in obstetrics as an example].
Olsen
O
O
Det Nordiske Cochrane Center, H:S Rigshospitalet, København.
Gøtzsche
P C
PC
D019317:Evidence-Based Medicine; D005260:Female; D006801:Humans; D015201:Meta-Analysis as Topic; D011247:Pregnancy; D016216:Ultrasonography, Prenatal