
                         Roanoke Times
                 Copyright (c) 1995, Landmark Communications, Inc.

DATE: THURSDAY, May 31, 1990                   TAG: 9005310282
SECTION: NATIONAL/INTERNATIONAL                    PAGE: A-8   EDITION: METRO 
SOURCE: 
DATELINE:                                 LENGTH: Short

BRIEFLY

The rare blood disorder linked to the dietary supplement L-tryptophan appears to be caused by impurities found in the supplements, and immune-system weaknesses that make some people more susceptible to the illness, federal health officials said Wednesday.

Two Air National Guard fighter jets collided in a ball of flame Wednesday during a training flight over northwestern Iowa but both pilots and a civilian passenger parachuted to safety.

by CNB