Background: The non-medical use of prescription psychostimulants or cognitive-enhancing substances among healthy college students is a growing concern.This use appears to be particularly high among medical students.To our knowledge, no literature is available on the non-medical use of stimulants among South African medical students.Objective: To de
Structural anti-reflective coating and bactericidal surfaces, as well as many other effects, rely on high-aspect-ratio (HAR) micro- and nanostructures, and thus, are of great interest for a wide range of applications.To date, there is no widespread fabrication of dense or isolated HAR nanopillars based on UV nanoimprint lithography (UV-NIL).In addi
A 79-year-old boys rashguard woman presented with recurrent pulmonary edema.Extensive testing spanning 5 admissions showed only mild mitral regurgitation (MR).A transthoracic echocardiogram with the patient in the supine position and passive leg raise showed Apron severe MR.This suggested transient severe MR.She underwent mitral valve replacement a
The success of penetrating keratoplasty in terms of graft survival is excellent but visual rehabilitation continues to be a significant issue primarily due to astigmatism.Factors contributing to postoperative astigmatism can be related to preoperative etiology, suturing techniques and the postoperative healing process and timing of surgery.The larg