Age dependency of plasma vitamin B12 status markers in Dutch children and adolescents.

Background: Vitamin B12 deficiency in children may be associated with (severe) neurological manifestations, therefore recognition is important. Diagnosing vitamin B12 deficiency in children is challenging. This study aimed to investigate plasma methylmalonic acid, holotranscobalamin, and total cobalamin in children 0-18 years of age and to estimate age-dependent reference intervals.

The genera Anafroptilum Kluge, 2011 and Neocloeon Traver, 1932, reinstated status, in North America, with remarks about the global composition of Centroptilum Eaton, 1869 (Ephemeroptera: Baetidae).

The mayfly genus Centroptilum Eaton, 1869, s.s., (Ephemeroptera: Baetidae), as presently understood, is not known to occur in North America.

Consequences of infertility in developing countries: results of a questionnaire and interview survey in the South of Vietnam.

Background: This study explores the psychological, socio-cultural and economic consequences of infertility on couples' life. The purpose of this research is to improve knowledge about the potentially serious implications of infertility in the South of Vietnam.

Methods: This study included 118 infertile couples who filled in questionnaires and 28 men and women who were interviewed.