Last month iMedicalApps' Dr. Iltifat Husain penned a great piece of reporting on a paid iPhone app that purported to a sense user's blood pressure using just the phone's camera. Apart from the troubling claim, the developer said it was using a method developed by Johns Hopkins (which has denied any ties to the group). What's more, the $3.99 app, called Instant Blood Pressure, was one of the top...