However, the assessment of the antinociceptive effects of HA preparations solely from human studies is difficult for several reasons, namely the strong placebo effect upon intra-articular injection, the long duration of the observation period (eventually with disease progression), the difficulty to test different doses of one compound, and the difficulty to compare different HA preparations.
However, any one of these effects could individually be incorporated into the model without much difficulty, to test specific hypotheses.
Conditional knockout models have provided an opportunity to bypass this difficulty, and to test the role of specific isoforms in the activation of the ERK pathway in different organs.
These songs comprised of both similar and dissimilar chords/rhythms and various instruments to test the difficulty in song identification.
To test the difficulty or ease of using our protocol to detect the LFCN, the other two radiologists (Y.X. and F., who both had 2 years of neuromuscular ultrasound experience) were trained by J.A to perform the ultrasound examination procedure for inspecting the LFCN, and the time taken to identify the nerve was recorded.
Notwithstanding these difficulties, we outline below some prospects to test the theory in plants and in animals.
Although the possibility of tissue protective benefit with EPO administration in the critically ill is clearly of interest, the difficulties involved in conducting clinical studies to test the hypothesis should not be underestimated.
Then, there's the Jaeger-Mills method, in which educators assign precise difficulty ratings to test questions.
Due to testing difficulties, the number of RC column tested under bidirectional displacement with varying axial load is very reduced, and it is always associated with tests with constant axial load, as summarised in Table 1; thus, the few available results do not allow for solid conclusions to be drawn about coupling behaviour between biaxial bending and the varying axial force.
