Prevention of severe ovarian hyperstimulation syndrome in IVF with or without ICSI and embryo transfer: a modified “coasting” strategy based on ultrasound for identification of high-risk patients. - al-Shawaf,T.; Zosmer,A.; Hussain,A.; Tozer,A.; Panay,N.; Wilson,C.; Lower,A.M.; Grudzinskas,J.G. (Hum Reprod, 2001)