The magnitude and correlates of alcohol and drug use before traumatic brain injury.

Objective: To describe preinjury alcohol and drug use and opportunities for secondary prevention among persons with recent traumatic brain injury (TBI).

Design: Survey.

Setting: Acute inpatient rehabilitation program.

The genome of the tropical tree Theobroma cacao L.

2C values for angiosperms vary over 2500-fold and a positive correlation exists between C-value and latitude in herbaceous plants. Woody plants differ from herbaceous plants in chromosome size and C-value. In addition, tropical hardwoods have smaller chromosomes than other tropical plants and do not share the correlation of minimum generation time with genome size seen in herbaceous plants.