Toxicity Equivalency Factors for Marine Biotoxins Associatedbecause of the shortage of test material, early studies focussed on toxicity by ... (3?) modified from EURL-validated method, with only OA group quantified, ... and Menard, 2004; Van de Riet et al., 2009, 2011; Ben-Gigirey, Rodriguez-Velasco. Toxicity Equivalency Factors for Marine Biotoxins Associatedbecause of the shortage of test material, early studies focussed on toxicity by ... (3?) modified from EURL-validated method, with only OA group quantified, ... and Menard, 2004; Van de Riet et al., 2009, 2011; Ben-Gigirey, Rodriguez-Velasco. Toxicity Equivalency Factors for Marine Biotoxins Associatedbecause of the shortage of test material, early studies focussed on toxicity by ... (3?) modified from EURL-validated method, with only OA group quantified, ... and Menard, 2004; Van de Riet et al., 2009, 2011; Ben-Gigirey, Rodriguez-Velasco.