1.   Of course the other important contributing factor to the success of the personal digital assistant will be software.

2.   Stress is a contributing factor in many illnesses.

3.   The contraceptive pill is also a contributing factor.

4.   Whether caffeine is the root cause of your insomnia or just a contributing factor, your caffeine consumption needs to be addressed.

5.   Stress, both human and mechanical, may also be a contributing factor.

6.   That is certainly a contributing factor, but similar conditions obtain in other countries where kidnapping is almost unknown.

7.   Finally, recurrent HBV infection was a principle or a contributing factor in all deaths.