I am trying to calculate polygenic risk scores. Basically these are calculated using a set of weighted SNPs. The score assigned to an individual can be correlated with many things such as risk for disease. Many polygenic risk scores (or models) have been devised and published in literature. I though I would be able to look up one of these publications and find a list of the SNPs they use along with the weights and formula for calculating the score. That way I could use their model to calculate polygenic risk for an unknown sample. However, despite the many publications, I am finding it hard to find any that present their model so simplistically. For some papers the calculation of polygenic risk score is hopelessly impenetrable. Are there any review articles that make calculating polygenic risk more approachable? any there any papers that propose a polygenic risk model (for anything) in simple terms with the SNPs, weights, and formula for actually applying the model? How do I look up a published model and calculate the score for an unknown sample? Why dont these publications come with a script for computing the score given a bam file or vcf file? Any help is appreciated.