Before revision:  Important modifications in the force field now allow us to treat a much larger variety of structures thanks to the possibility of one base to form multiple contacts and non-canonical pairings, which are essential for the formation and the stability of structures such as pseudoknots, multiple helices, and the complex architecturesof riboswitches\mus  .
After revision:  Important modifications in the force field now allow us to treat a much larger variety of structures thanks to the possibility of one base to form multiple contacts and non-canonical pairings, which are essential for the formation and the stability of structures such as pseudoknots, multiple helices, and the complex architecturesof riboswitches\mus simulation time .