update pull request template

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,26 +1,27 @@
 # What?
-Fix # .
+Fix # (see https://help.github.com/en/articles/closing-issues-using-keywords)
 
-Cancer studies updated in this pull request:
+Describe changes proposed in this pull request:
 - a
-- .
+- b
 
 # checks
 For all pull requests:
 - [ ] Passes validation
 
 For a new study (in addition to above):
 - [ ] Does study name and study ID follow our convention? e.g. Tumor_Type (Institue, Journal Year); brca_mskcc_2015
-- [ ] is study meta data complete? e.g. pmid, group of PUBLIC
-- [ ] were all samples profiled with WES/WGS? If not, is gene panel file curated?
-- [ ] are oncotree codes of all samples curated; Cancer Type and Cancer Type Detailed needs to be added in addition to Oncotree Code
-- [ ] clinical sample and patient data with meta files
-- [ ] mutations data with meta files
-- [ ] MAF is based on hg19
-- [ ] MAF with 2 isoforms: uniprot and mskcc
+- [ ] Is the study meta data complete? e.g. pmid, citation
+- [ ] Were all samples profiled with WES/WGS? If not, is gene panel file curated?
+- [ ] Are oncotree codes of all samples curated; Cancer Type and Cancer Type Detailed needs to be added in addition to Oncotree Code
+- [ ] Clinical sample and patient data with meta files.
+- [ ] Mutations data with meta file.
+- [ ] Is the study based on hg38? If so, is the reference_genome: hg38 option included in meta study.
 - [ ] CNA data with meta files
 - [ ] CNA segment data with meta files
 - [ ] Expression data including z-scores with meta files
+- [ ] Other genomic profiles with meta files
 - [ ] Case-lists for all profiles.
+- [ ] Perform sanity checks based on the items in the [checklist](https://github.com/cBioPortal/datahub/blob/master/docs/curation-process.md)
 - [ ] Manual checking (Niki or JJ): Triage or private Portal link here