guanine Article 6 cytosine 5 thymine 5 adenine 4 female 4 genetics 4 human 4 Female 2 Humans 2 allele 2 case report 2 child 2 clinical article 2 controlled study 2 diagnostic imaging 2 gene mutation 2 genetic analysis 2 genetic variability 2 major clinical study 2 male 2 nuclear magnetic resonance imaging 2 nucleotide 2 physical examination 2 single nucleotide polymorphism 2 Adolescent 1 Anemia, Sickle Cell 1 Apgar score 1 Bacteria (microorganisms) 1 Base Sequence 1