Hi, I always find it difficult to choose which previous research papers should be cited. For example, if my research is about a particular gene in a certain disease, should I include all the past works regarding the gene in this disease? Some of the past works are those published in the 1970s, and others have less convincing data due to the small sample size and/or poor study design. Is it ok to pick the most scientifically convincing and pertinent papers and ignore and not cite the others? Or...