A female may tie a stem.Logical formLearned from5 sentences. (Stem cells) may proliferate.Logical formLearned from5 sentences. Stems can be leafy.Logical formLearned from5 sentences. Research can be on embryonic (stem cells).Logical formLearned from5 sentences. (Stem cells) may undergo a delivery.Logical formLearned from5 sentences. Neural (stem cells) may undergo injections.Logical formLearned from5 sentences. (Stem cell markers) can be embryonic.Logical formLearned from5 sentences. (Stem cell lines) may undergo a generation.Logical formLearned from5 sentences. A derivation of (stem cells) can be justifiable.Logical formLearned from5 sentences. A stem may pertain-to a plant.Logical formLearned from5 sentences. A stem may pertain-to a word.Logical formLearned from5 sentences. Backers can be constituted-of-or-filled-with (stem cell research).Logical formLearned from5 sentences. (Stem cells) may be extracted from blood.Logical formLearned from5 sentences. Stems can be round.Logical formLearned from5 sentences. Stems can be silvery-white.Logical formLearned from5 sentences.