Parkinsonian syndromes can be classified into 2 major groups: Parkinson disease (PD)andatypicalparkinsoniandisorders. Commoncharacteristics includeakinesia, expressed as slowness and paucity of movement (eg, decreased arm swing or facial expression) and difficulty in initiating movement, and are associated with rigidity with or without resting tremor. Parkinsonian syndromes frequently occur in ...

Weakly interacting massive particles (WIMPs) remain the strongest candidates for the dark matter in the Universe. If WIMPs are the dark matter, they will form galactic halos according to the hierarchical clustering observed in N-body simulations. Cold dark matter (CDM) simulations show that large dark matter structures such as galactic and cluster halos are formed by the merging of many smaller...

Prescribing anticoagulants to pregnant women can be difficult and stressful. Fortunately, low-molecular-weight heparins (LMWHs) and unfractionated heparin are quite safe and efficacious when properly selected, dosed, and monitored. Maternal and fetal concerns must be considered at all times, with a careful assessment of the risks and benefits of anticoagulant therapy in each patient. Further re...