“Hide and seek” with antineutrophil cytoplasmic antibodies

“Hide and seek” with antineutrophil cytoplasmic antibodies Matteo Alicandri-Ciufelli, MD, Gabriele Molteni, MD⁎, Maria Teresa Mascia, MD, Elisabetta Genovese, MD, Livio Presutti, MD Department of Otolaryngology-Head and Neck Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, Modena, Italy Department of Rheumatology, Azienda Ospedaliero-Universitaria Policlinico di Modena, Modena, Italy Received 19 April 2009