Abstract Background Premature ovarian insufficiency (POI) is a clinical syndrome defined by loss of ovarian function before the age of 40 years, characterized by elevated serum gonadotropin levels and decreased estrogen levels with menstrual disturbance.POI can be natural or iatrogenic such as after chemotherapy, radiotherapy and surgery.Case prese
Attitudes of a worldview character always live in society.In the worldview of individual persons, we find the cultural characteristics of different peoples, which, in turn, is related to the development of material history, as well as the emergence and organization of certain methods of social production.Beliefs in which the basic meaning of life v
Cooking is a very decentralized and private way of energy consumption in human activities.The existing investigation and statistical analysis can’t effectively calculate the proportion of population relying on clean cooking fuel and utilization technology in the region.Therefore, based on the big data of the earth, this paper adopts the comb
Abstract Background The Charlson comorbidity index is often used to control for spacecase lemonhead confounding in research based on medical databases.There are few studies of the accuracy of the codes obtained from these databases.We examined the positive predictive value (PPV) of the ICD-10 diagnostic coding in the Danish National Registry of Pat