title: Preface.
authors.affiliation: Radiation Medicine Centre (BARC), Tata Memorial Hospital Annex Building, Parel, Mumbai, 400012, India.
authors.forename: Sandip
authors.initials: S
authors.lastname: Basu
authors.affiliation: Department of Nuclear Medicine, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Rakesh
authors.initials: R
authors.lastname: Kumar
authors.affiliation: Department of Nuclear Medicine, Yeditepe University Hospital, Devlet Yolu Ankara Caddesi No: 102/104, Kozyatagi, Istanbul 34752, Turkey.
authors.forename: Ayşe
authors.initials: A
authors.lastname: Mavi
authors.affiliation: Nuclear Medicine Section, Department of Radiology, Hospital of the University of Pennsylvania, 3400 Spruce Street, Philadelphia, PA 19104, USA.
authors.forename: Abass
authors.initials: A
authors.lastname: Alavi