Update README.md

Author: jcpapp

README.md

@@ -20,11 +20,11 @@ A collection of Jupyter notebooks for using [OpenMendel](https://openmendel.gith
 
 If you use [OpenMendel](https://openmendel.github.io) analysis packages in your research, please cite the following reference in the resulting publications:
 
-Lange K, Papp JC, Sinsheimer JS, Sripracha R, Zhou H, Sobel EM (2013) Mendel: The Swiss army knife of genetic analysis programs. Bioinformatics 29:1568-1570.
+OPENMENDEL: a cooperative programming project for statistical genetics. Zhou H, Sinsheimer JS, Bates DM, Chu BB, German CA, Ji SS, Keys KL, Kim J, Ko S, Mosher GD, Papp JC, Sobel EM, Zhai J, Zhou JJ, Lange K. Hum Genet. 2019 Mar 26. doi: 10.1007/s00439-019-02001-z. [Epub ahead of print] PMID: 30915546
 
 <!--- ## Contributing
 We welcome contributions to this Open Source project. To contribute, follow this procedure ... --->
 
 ## Acknowledgments
 
-This project is supported by the National Institutes of Health under NIGMS awards R01GM053275 and R25GM103774 and NHGRI award R01HG006139.
+This project is supported by the National Institutes of Health under NIGMS awards R01GM053275 and R25GM103774 and NHGRI award R01HG006139.