Anthony F. Jahn, MD, internationally acclaimed otolaryngologist and Director of Medical Services at the Metropolitan Opera in New York, offers a comprehensive guidebook on a wide range of health an
Anthony F. Jahn, MD, internationally acclaimed otolaryngologist and Director of Medical Services at the Metropolitan Opera in New York, offers a comprehensive guidebook on a wide range of health an
Singer and actors are a unique group of performers, relying almost entirely on their voice for the professional livelihood. Jet lag, amplification, allergens, stress, pollution, and vocal strain all a
