Wenonah Vercoutere, Stephen Winters-Hilt, Hugh Olsen, David Deamer, David Haussler, and Mark Akeson

Nat. Biotechnol. 19, 248–252 (2001).

The URL given for the DNA mfold server in Table 1 (p. 249 ) and in the text (p. 251) is incorrect. The correct URL is http://bioinfo.math.rpi.edu/~mfold/dna/form1.cgi

The authors regret the error.