Dr. Copenhaver and Dr. Sah have both been nominated as a "Mom-Approved" doctors by Dallas Child magazine and recognized as Top Pediatric Specialists by D Magazine! Our office, Pediatric Pulmonary and Sleep Specialists , is proud to provide the community with the services of two board-certified pediatric pulmonologists.Meet Our Doctors‧What We Treat‧Synagis/RSV‧Billing Info‧Contact Us‧About.