Response to comments on "effect of uncontrolled factors in a validated liquid chromatography-tandem mass spectrometry method question its use as a reference method for marine toxins: Major causes for concern"

1. Otero, P.
2. Alfonso, A.
3. Alfonso, C.
4. Rodríguez, P.
5. Vieytes, M.R.
6. Botana, L.M.