Dr. Shelby Marquardt, an anesthesiology resident at Memorial Hermann Hospital in Houston, has been sewing since she was a child. But the young physician never thought her hobby would turn into a business. However, with the help of husband David Marquardt, owner of Austin cleaning company The Steam Team Inc., Shelby Marquardt recently launched Blue Sky Scrubs, a clothing company specializing in scrub hats for men and women who work in health care settings. ..