21.   Marbach believed the disorder was caused by a combination of psychological, social and biological factors.

22.   Most other genetic disorders are caused by a hereditary mutation at a specific location on a specific chromosome.

23.   Physicians said Gunnar had inherited a defective gene from each parent, causing the disorder.

24.   Substantially changing their diets could cause digestive disorders.

25.   Tests have also shown that dioxin can cause developmental disorders in young animals.

26.   The genes will trigger production of certain proteins whose absence causes fatal disorders.

27.   The other camp favors solving social problems by establishing programs to assist the individuals who cause social disorder.

28.   The same disorder is caused by different mixes of genes, and by environmental factors.

29.   With the help of Kebodeaux and others who have Stargardt disease, a team of researchers from four institutions has identified the gene that causes the disorder.

30.   Post-traumatic stress disorder is caused by a fixation with an emotionally charged event.