Portion size estimation in dietary assessment: a systematic review of existing tools, their strengths and limitations

1. Amoutzopoulos, B.
2. Page, P.
3. Roberts, C.
4. Roe, M.
5. Cade, J.
6. Steer, T.
7. Baker, R.
8. Hawes, T.
9. Galloway, C.
10. Yu, D.
11. Almiron-Roig, E.