@article {vadimHDMFPCA,
	title = {Multilevel functional principal component analysis for high-dimensional data},
	journal = {Journal of Computational and Graphical Statistics, NIMHID: 306063},
	volume = {20},
	number = {4},
	year = {2011},
	pages = {852{\textendash}873},
	author = {Zipunnikov, V. and Caffo, B and Crainiceanu, C and Yousem, D and Davatzikos, C. and Schwartz, B}
}
