Scientific Reports 3, Article number: 1028 (2013); Published: 4 January 2013; Updated: 1 July 2013

There are two typographical errors in the legend of Figure 1. The sentence, “Idealized chemical structure of hydroxypropylcellulose (HPC), R-CH2CH(OR′)CH3 or -H (R′- H or -CH2CH(OH)CH3), with an average degree of substitution of 3.5″ should read, “Idealized chemical structure of hydroxypropylcellulose (HPC), R-OCH2CH(OR′)CH3 or -OH (R′- H or CH2CH(OH)CH3), with an average degree of substitution of 3.5″.