However, confounding by smoking behaviour is more problematic when comparing lung cancer between HIV-positive and HIV-negative subjects (Engels et al, 2006; Chaturvedi et al, 2007; Shiels et al, 2010; Engsig et al, 2011).
The future of gods, spirits and ancestors is, however, more problematic.
Such difficulties become even more problematic when the base of the robot's arm is mobile.
"It's more problematic when it's about companies turning over their customers' records".
Such information sharing is even more problematic when salaries are involved, he said.
It gets even more problematic when you come to the studies he made of the nude.
Accessing other researchers' materials and/or data, such as cell lines, reagents, or unpublished information is, however, more problematic.
Such interpretative agendas are more problematic when imposed on much older works.
Fractures of resorbable devices are more problematic when major segmental movements are performed in orthognathic surgery.
It became significantly more problematic when developing countries (most notably China) grew into a major role.
