Concentrations of (sex hormones) may be associated with (disease risk factors).Logical formLearned from5 sentences. Eyebrows may furrow in concentration.Logical formLearned from5 sentences. Brows may be dipped in concentration.Logical formLearned from5 sentences. An experience can be in (concentration camps).Logical formLearned from5 sentences. Concentration can be focused.Logical formLearned from5 sentences. Children may have concentration.Logical formLearned from5 sentences. Concentration can be in occupations.Logical formLearned from5 sentences. Aflatoxin may undergo concentrations.Logical formLearned from5 sentences. A key can be concentration.Logical formLearned from5 sentences. Tigers may undergo concentrations.Logical formLearned from5 sentences. A (chemical substance) may undergo concentration.Logical formLearned from5 sentences. A person may be amazed at concentration.Logical formLearned from5 sentences. Concentration can be vocal.Logical formLearned from5 sentences. Persons may concentrate on an act of concentration.Logical formLearned from5 sentences. Exposure can be to concentrations of an element.Logical formLearned from5 sentences.