articles                give references like articles or uris
articles,refs-method    Gives back references like articles or uris
                        from an refs object, if 'item' is given only
                        the respective information will be extracted,
                        if omitted information for all items will be
                        returned
cdc.ref                 LMS Parameters for the Centers for Disease
                        Control and Prevention 2000 Growth Charts,
                        contains bmi, height, head cirumference,
                        weight, weight for length,
childsds                childsds.
kiggs.ref               LMS Parameters for German reference data
                        (KiGGS, 2003-2006) for height, weight, bmi,
                        hip, whr, bodyfat, skinfold sum, triceps
                        skinfold, and waist circumference
kro.ref                 LMS Parameters for German reference data
                        (Kromeyer Hauschild, 2001) for height, weight,
                        bmi, and waist circumference, including preterm
                        correction (Voigt)
refs-class              Class of references
sds                     calculates standard deviation scores according
                        to a given reference
sds,refs-method         calculates standard deviation scores according
                        to a given reference
sds.df                  calculates standard deviation scores according
                        to a given reference
sds.df,refs-method      calculates standard deviation scores according
                        to a given reference and adds the respective
                        column
show,refs-method        Shows 'items' and additional information of an
                        'refs' object
ukwho.ref               LMS Parameters for UK-WHO growth charts for
                        height, weight, bmi, head circumference
who.ref                 LMS Parameters for UK-WHO growth charts for
                        height, weight, bmi, head circumference,arm mid
                        upper arm circumference, subscapular and
                        triceps skinfold, weight for height
