The lack of or short lifetime duration of breastfeeding typical of women in developed countries makes a major contribution to the high incidence of breast cancer in these countries. (amotherinisrael.com)
Note: A person may make no more than five driving school / traffic school elections throughout their driver license lifetime duration. (avantidriving.com)
The researchers used this data to calculate the mean duration of breastfeeding per child and cumulative lifetime duration of any breastfeeding for all children. (medpagetoday.com)