Differential effects of baseline drinking status: effects of an alcohol prevention program targeting students and/or parents (PAS) among weekly drinking students.The effects of an intervention designed to prevent onset of weekly drinking in non drinking students (PAS) were investigated in the group of students that was already drinking at baseline.  Thus, the combined PAS intervention is also effective in curbing adolescents' drinking behaviour in those who already were drinking at baseline. 
PAS
Differential effects of baseline drinking status: effects of an alcohol prevention program targeting students and/or parents (PAS) among weekly drinking students.The effects of an intervention designed to prevent onset of weekly drinking in non drinking students (PAS) were investigated in the group of students that was already drinking at baseline.  Thus, the combined PAS intervention is also effective in curbing adolescents' drinking behaviour in those who already were drinking at baseline. 
PAS
Differential effects of baseline drinking status: effects of an alcohol prevention program targeting students and/or parents (PAS) among weekly drinking students.The effects of an intervention designed to prevent onset of weekly drinking in non drinking students (PAS) were investigated in the group of students that was already drinking at baseline.  Thus, the combined PAS intervention is also effective in curbing adolescents' drinking behaviour in those who already were drinking at baseline. 
PAS
Differential effects of baseline drinking status: effects of an alcohol prevention program targeting students and/or parents (PAS) among weekly drinking students.The effects of an intervention designed to prevent onset of weekly drinking in non drinking students (PAS) were investigated in the group of students that was already drinking at baseline.  Thus, the combined PAS intervention is also effective in curbing adolescents' drinking behaviour in those who already were drinking at baseline. 
PAS
Differential effects of baseline drinking status: effects of an alcohol prevention program targeting students and/or parents (PAS) among weekly drinking students.The effects of an intervention designed to prevent onset of weekly drinking in non drinking students (PAS) were investigated in the group of students that was already drinking at baseline.  Thus, the combined PAS intervention is also effective in curbing adolescents' drinking behaviour in those who already were drinking at baseline. 
PAS