Undoubtedly ICP-AES and AAS are the preferred methods although the relevant instrumentation is costly.
Whole-exome sequencing and targeted NGS are the preferred methods for screening of PCC/PGL, both having precise mutation detection methods and low costs.
PLS and PCR models applied to the spectral data matrix that used the first derivative pre-treatment were the preferred methods.
Biological nitrogen removal (BNR) processes are the preferred methods for removing nitrogen compounds from wastewater because of the low cost, energy, and chemical requirements of BNR compared with physical chemical treatment.
Notably, IUD, injectables and sterilization are the preferred methods for family planning in Pakistan [ 27].
The most common statistical approach was the two-staged hypothesis testing method, with Simon's methods (optimal and minimax) being the preferred methods.
More recently, semi-quantitative and quantitative comparisons of protein relative abundance are the preferred methods for identifying differentially expressed proteins [ 12].
From an analytical point of view, chromatography techniques are the preferred methods to determine the true amount of biomarkers in biological materials, once they are reliable, specific and, moreover, without the presence of artefacts or methodological mistakes.
MRI and to a lesser extent CT, are the preferred methods for the evaluation of the efficiency of RF ablation of primary and secondary hepatic tumors, and for the detection of local recurrences.
Again, stepwise algorithms (46%) and significance testing of individual regression coefficients (45%) were the preferred methods, but 9% of the articles also did not specify how they selected the final variables.
