How do you define a gene list?
The comment seems useful as your current definition of a gene list lacks context. 


  How would you define a gene list?


There are many different kinds of gene list. Specifying gene lists from microarray and next-generation sequencing provides some context but both technologies are used to analyse many different kinds of DNA and RNA samples. Define the molecules that are being referenced by the gene lists.

Defining DNA or RNA isn't sufficient as each gene list is compiled to perform a research task. Genomic projects may provide lists of genes that were sequenced or mutated or contained single nucleotide polymorphisms. An RNA transcript project may create lists of genes where transcription was occurring in a tissue or whose RNA transcripts were influenced by experimental factors or whose splicing was altered. Most publications also include multiple gene lists and some of those will include rows that were removed following data evaluation. Define the kind of lists that you are collecting.

There's value in defining your search criteria well. It allows you to communicate your work to others and it can provide focus to your search efforts.


  What criteria did I use?


This was mostly answered above. I would also consider including some rules for the publications that you will search for gene lists.