The app can JBZlab of the Jeroen Bosch hospital applicants for the clinical laboratory laboratory guide consult among others with up-to-date reference values, determination frequency, current announcements and newsletters. The user of the app can directly consult a clinical chemist by phone or email. Users outside the Jeroen Bosch Hospital can be requested via the App information on opening hours of the blood and puncture posts. There is also background information on laboratory testing to find information on NZa rates.