Update index.md

docs/pages/tools/index.md

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 [*CellCommuNet*](http://www.inbirg.com/cellcommunet/) is an atlas of cell–cell communication networks from single-cell RNA sequencing data of human and mouse tissues in normal and disease states [[*Ma et al. NAR 2024*](https://academic.oup.com/nar/article/52/D1/D597/7321072)].
 
-[*3CA*](https://www.weizmann.ac.il/sites/3CA/) is the pan-cancer single-cell RNA-sequencing dataset focusing on intratumour heterogeneity associated to [Gavish et al Nature 2023](https://pubmed.ncbi.nlm.nih.gov/37258682/) paper.
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 [*IMMUcan scDB*](https://immucanscdb.vital-it.ch/) is a fully integrated scRNA-seq database exclusively dedicated to human cancer. IMMUcan scDB encompasses 144 datasets on 56 different cancer types, annotated in 50 fields containing precise clinical, technological, and biological information [[Camps et al. Cancer Res. 2023](https://pubmed.ncbi.nlm.nih.gov/36459564/)].
 
 [*TISCH2*](http://tisch.comp-genomics.org/) is s a scRNA-seq database focusing on tumor microenvironment (TME). TISCH2 provides detailed cell-type annotation at the single-cell level, enabling the exploration of TME across different cancer types.
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 [*Broad Single Cell Portal*](https://singlecell.broadinstitute.org/single_cell) Broad institute single cell portal.
 
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 ##### Lung adenocarcinoma cell line mixture 
 ‘Pseudo cells’ were created from to five distinct human lung adenocarcinoma cell lines by [*Tian et al 2019*](https://pubmed.ncbi.nlm.nih.gov/31133762/). GEO dataset [GSM3618014](https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSM3618014)] contains the mixture of five cell lines: