Index: /qipapers.bib
===================================================================
--- /qipapers.bib	(revision 773)
+++ /qipapers.bib	(revision 774)
@@ -22792,2 +22792,12 @@
   author = {Richards, C.I. and Hsiang, J.-C. and Dickson, R.M.}
 }
+@article{Marriott2008,
+  number = {46},
+  year = {2008},
+  title = {Optical lock-in detection imaging microscopy
+for contrast-enhanced imaging in living cells},
+  pages = {17789-17794},
+  journal = {Proceedings of the National Academy of Sciences USA },
+  volume = {105},
+  author = {Mariott, G. and Mao, S. and Skata, T. and Ran, J. and Jacksson, D.K. and Petchprayoon, C. and Gomez, T.J. and Warp, E. and Tulyathan, P. and Aaron, H.L. and Isacoff, E.Y. and Yan, Y.}
+}