This is the ValueSet that contains codes in both Vital Sign Result Type (http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.3.88.12.80.62) and Cigarette Smoking Before and During Pregnancy (http://hl7.org/fhir/us/bfdr/ValueSet/cigarette-smoking-before-during-pregnancy).