RT Journal Article SR Electronic T1 Inadequate Exercise Leads to Suboptimal Imaging. Thallium-201 Myocardial Perfusion Imaging after Dipyridamole Combined with Low-Level Exercise Unmasks Ischemia in Symptomatic Patients with Non-Diagnostic Thallium-201 Scans Who Exercise Submaximally JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 2071 OP 2078 VO 32 IS 11 A1 J. Fred Verzijlbergen A1 Paul HMJ Vermeersch A1 Gert-Jan Laarman A1 Carl APL Ascoop YR 1991 UL http://jnm.snmjournals.org/content/32/11/2071.abstract AB