BESS: CV BeSS fit
In FRESA.CAD: Feature Selection Algorithms for Computer Aided Diagnosis

Fits a BeSS::bess object to the data, and return the selected features

1	BESS(formula = formula, data=NULL, method="sequential", ic.type="BIC",...)

`formula`	The base formula to extract the outcome
`data`	The data to be used for training the bess model
`method`	BeSS: Methods to be used to select the optimal model size
`ic.type`	BeSS: Types of best model returned.
`...`	Parameters to be passed to the `BeSS::bess` function

`fit`	The `BsSS::bess` fitted object
`formula`	The formula
`usedFeatures`	The list of features used by fit
`selectedfeatures`	The character vector of the model features according to BeSS type