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Jan Alexander,
Helle Margrete Meltzer,
A. Brantsaeter,
2007,
Maternal & child nutrition.
Jan Alexander,
Yngvar Thomassen,
Helle Margrete Meltzer,
2010,
Environmental research.
Jan Alexander,
Yngvar Thomassen,
Helle Margrete Meltzer,
2009,
Public Health Nutrition.