Calibration of citrus intake assessed by food frequency questionnaires using urinary proline betaine in an observational study setting.
Yang HuMolin WangWalter C WillettMeir StampferLiming LiangFrank B HuEric RimmLorraine BrennanQi Sun
Published in: The American journal of clinical nutrition (2024)
Our 2-step calibration approach has the potential to be adapted to correct systematic measurement error for other foods/nutrients with established food biomarkers in a cost effective way.