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Subjects: PREMATURE labor; DURATION of pregnancy; PREMATURE infantsCANADA; EUROPE; JAPAN
Subjects: *CHIROPRACTORS; *SPINAL adjustment; *DEATHCANADAMATHIASON, Laurie; KRAMER, Stacey
Subjects: MULTIPLE birth; PREMATURE labor; TRIPLETSCANADA
Subjects: INFANT mortality; PREGNANCY complications; PRENATAL diagnosisCANADA
Subjects: INFANT mortality; PERINATAL deathCANADA