{"1":{"study_id":"ST000011","study_title":"African Metabolomics","institute":"University of Michigan","analysis_id":"AN000027","analysis_type":"MS","units":"Peak area","num_metabolites":"127","details":"LC\/Electro-spray \/QTOF positive ion mode","species":"Homo sapiens"},"2":{"study_id":"ST000011","study_title":"African Metabolomics","institute":"University of Michigan","analysis_id":"AN000028","analysis_type":"MS","units":"Peak area","num_metabolites":"135","details":"LC\/Electro-spray \/QTOF negative ion mode","species":"Homo sapiens"}}