Establishment of Dna Dyads Bio-Bank from Umbilical Blood Samples in Full-Term Newborn Infants and Peripheral Blood in the Mothers and Estimating the Transmission Rate of Common Genes between Low and Normal Birth Weight = 建立足月新生兒臍帶血和母親週邊血液標本建立之DNA基因庫並探討影響低出生體重基因之下傳率