Morphometric analysis of the C1-2 zygapophysial joint in atlantoaxial dislocation patients with sandwich fusion of the craniovertebral junction.

The combination of congenital C1 occipitalization and C2-3 non-segmentation (i.e. "sandwich fusion") results in early development of atlantoaxial dislocation (AAD).

An Evaluation of Exposure to 18 Toxic and/or Essential Trace Elements Exposure in Maternal and Cord Plasma during Pregnancy at Advanced Maternal Age.

Pregnant women of advanced maternal age (AMA) are vulnerable to exposure to the surrounding environment. Assessment of trace elements in pregnant women living in specific areas is important for biomonitoring. However, exposure levels and variation patterns during pregnancy remains controversial and attracts extensive public concern.