Although major aspects of limitations and missing validation are addressed in the discussion, the key message presented is that 'it is possible to distinguish between lung ventilation and perfusion using electrical impedance tomography'.
Another aspect of this limitation is that our study may be susceptible to systemic bias; referral bias, for example, may be present in our dataset.
Here, we introduce an additional quality control means that deals with one aspect of this limitation: by combining autosomal short tandem repeat (STR) marker with mtDNA information, it helps to avoid the bias introduced by related individuals included in the same (small) sample.
Other scales, like the Gross Motor Function Scale (GMFS), focus only on one aspect of function, limitations in motor function [ 20].
The negative oral impacts experienced by women were mainly in the aspects of functional limitation and physical pain.
However there was partial separation of the generic and specific items, EuroQol covered daily activities such as self-care and usual activities and OHIP covered oral health-specific aspects of functional limitation and physical disability as well as psychological and social aspects of disability and handicap.
While officials focused on the public health aspect of the age limitation, the announcement was also infused with political overtones.
It will explain how the environmental and social character of disability has been largely overlooked by contractarian and egalitarian theories, not so much because of their distributive focus, but because of their narrow focus on one aspect of disability – functional limitation – to the neglect of exclusionary attitudes and practices.
The second reason, which is a beneficial aspect of this methodological limitation, has to do with the object itself of research on equity and health policies.
The exception has been the MRC dyspnoea scale [ 12] but this is a uni-dimensional scale capturing a single aspect of COPD – activity limitation.
