Imunological and clinical characteristics in children with polyarteritis nodosa: a retrospective study over the last 20 years - Malenica Branko; Potocki Kristina; Starcevic Katarina; Vidovic Mandica; Milosevic Danko; Batinic Danica; Malcic Ivan; Topic Masa; Jelusic-Drazic Marija (BMC, 2011)