On September 13th, together with Professor Anne Klassen (McMaster University) and Dr Andrea Pusic (Memorial Sloan Kettering Cancer Center), Stefan will be visiting the Center for Devices and Radiological Health (CDRH) at the US Food and Drug Administration. This will be the third time Stefan, Anne and Andrea have been invited by FDA to present on Q-PORTFOLIO measures. This time they have been asked to talk about interpretation of the BREAST-Q (http://qportfolio.org/breastq/), FACE-Q (http://qportfolio.org/faceq/), BODY-Q scores (responder definitions; cut-scores), use in clinical practice and clinical trials, and best practice guidelines for developing and evaluating PRO instruments.