This paper is in the following e-collection/theme issue: Personal Health Records, Patient-Accessible Electronic Health Records, Patient Portals (691) Clinical Informatics (1302) Public (e)Health, ...

Create a simple and sturdy paper towel holder using just a few basic tools and materials. This step-by-step guide makes it easy for anyone to add a functional touch to their kitchen or workshop.

Since the first motion-picture projectors in the 1890s, display technologies have evolved: from televisions and smartphones to virtual- and augmented-reality headsets, they have become deeply embedded ...