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Pohl, D; Savarino, E; Hersberger, M; Behlis, Z; Stutz, B; Goetze, O; Eckardstein, A V; Fried, M; Tutuian, R (2010). Excellent agreement between genetic and hydrogen breath tests for lactase deficiency and the role of extended symptom assessment. British journal of nutrition, 104(6), pp. 900-7. Cambridge: Cambridge University Press 10.1017/S0007114510001297
