These deficiencies are caused by a long-term lack of nutritious food or they can be caused by infections such as worms. There are 171 million children (17%) globally who do not have the opportunity to reach their full potential. This is due to not only the physical, but the mental effects of poor nutrition in the earliest months of life. Out of 171 countries, Iceland is first and Somalia is last. More than half of the world's children do not have access to the "Lifesaving Six": iron folate, breastfeeding, complementary feeding, vitamin A, zinc, and hygiene. Vitamin A  Zinc  Hygiene  Breastfeeding  Norway   Niger   Norway   Afghanistan    Norway   Afghanistan   The reports have been widely covered in the world press, with attention for local strengths and weaknesses. For example, in 2010 "USA Today" focused on the low ranking of the U.S. (28th place, below Estonia, Latvia, and Croatia) due to high rates of maternal and infant mortality, low preschool enrollment, and a particularly weak maternal leave benefit. It quoted the report: "ABC News" interviewed physicians and nonprofit leaders who questioned whether global comparisons could be made reliably, due to possible differences in the definition of ectopic pregnancy, stillbirth, and abortion statistics. Relevant factors may include lack of health insurance, illegal immigration by women with poor prenatal care, and maternal obesity statistics. According to Michael Katz, a senior vice president at the March of Dimes Foundation, "The major question I would ask is, 'Why do African American populations have worse results than the white population?'" Pravda.ru and Sify picked up an IANS/EFE report focusing on Cuba's rating as the best place to be a mother in the developing world. The "Herald Sun" boasted Australia's second-best placement for mothers, quoting a happy mother about hospital, maternal and child health support, and 12-month workplace maternal leave. However, the "Adelaide Advertiser" focused on Australia's lower [28th] ranking on the Children's Index, due in part to a child mortality rate three times higher for aboriginal infants. It quoted Save The Children's Annie Pettitt:  An editorial in the "Philippine Daily Inquirer" discussed explanations for the Philippine's 48th-place ranking in the second tier. The column attributed much of the problem to a "brain drain", though it described as "much too high" the SOWM report's figure that 85% of Filipino nurses leave to pursue better pay and standards of living overseas.