2017-03-23 Steven Chiou <schiou@hsph.harvard.edu>
	* Add scale change model
2016-09-21 Steven Chiou <schiou@hsph.harvard.edu>
	* Updated references.
2016-08-01 Steven Chiou <schiou@hsph.harvard.edu>
        * Cleaned the package for re-submission. 
2010-09-17 Xiaojing Wang <wangxj03@gmail.com>
	* Improved panelReg.
	* Add data set "bladTumor".
