Importance: The death of a close relative is associated with an increased mortality risk among the bereaved, but much less is known about the potential association of the death of a sibling in childhood with mortality in this population. Objective:…
Objective: The one-child policy has existed in China for more than 30 years. It brought benefits to the country's economic development and reduced the magnitude of the population within a short period. However, it has led to the emergence of a…
