Niels H Chavannes , Juanita HJ Vernooy , Tjard RJ Schermer , Jan A Jacobs , Mieke A Dentener , Chris van Weel , Onno CP van Schayck and Emiel FM Wouters
BMC Pulmonary Medicine 2006, 6:11doi:10.1186/1471-2466-6-11