Correction to: Advanced Robotic Therapy Integrated Centers (ARTIC): an international collaboration facilitating the application of rehabilitation technologies.

The original article [1] contains a small mistake concerning the ARTIC Team members mentioned in the Acknowledgements. The team member, Rocco Salvatore Calabrò had their name presented incorrectly. This has now been corrected in the original article.

Three by three weeks of robot-enhanced repetitive gait therapy within a global rehabilitation plan improves gross motor development in children with cerebral palsy - a retrospective cohort study.

AIM: To assess the improvement in gross motor function following three blocks of a three-week, intensive robot-enhanced treadmill therapy (ROBERT-Program). METHOD: retrospective chart review in a before-after interventional trial in children with cerebral palsy attending a university hospital outpatient rehabilitation centre. Patients received three blocks of a three-week, 12 sessions ROBERT-Program over a mean period of 24 months. Outcome measures were block specific and cumulative improvement in GMFM 66, D and E. Longterm GMFM 66 improvements were compared to the individuals' expected increment as derived from previously published GMFM-66 percentiles. 95% confidence intervals (CI) and paired t-test were calculated. RESULTS: 20 children (8 GMFCS Level II; 12 GMFCS Level III, mean age 5.9 years (CI: [5.0; 6.7])) were treated. For each block a significant increase in motor performance in similar size could be observed without deterioration between blocks. The cumulative improvement during 21 months observation period was: 6.5 (CI: [4.8; 8.2]) in GMFM 66, which represents a clinically meaningful effect size of 3.6 (CI: [1.4; 5.8]) above the expected improvement. INTERPRETATION: Progressive clinically meaningful improvement in motor performance for three blocks of ROBERT-Program was observed. Cumulative GMFM 66 improvements exceeded the individuals' age-specific expected course.

Prospective controlled cohort study to evaluate changes of function, activity and participation in patients with bilateral spastic cerebral palsy after Robot-enhanced repetitive treadmill therapy.

BACKGROUND: Robot-enhanced therapies are increasingly being used to improve gross motor performance in patients with cerebral palsy. AIM: To evaluate gross motor function, activity and participation in patients with bilateral spastic cerebral palsy (BS-CP) after Robot-enhanced repetitive treadmill therapy (ROBERT) in a prospective, controlled cohort study. METHODS: Participants trained for 30-60 min in each of 12 sessions within a three-week-period. Changes in Gross Motor Function Measure (GMFM 66) scores, standardized walking distance, self-selected and maximum walking speed (ICF domain "Activity"), and Canadian Occupational Performance Measure (COPM; "Participation") were measured. Outcome measures were assessed three weeks in advance (V1), the day before (V2) as well as the day after, and 8 weeks after ROBERT (V3 + V4). RESULTS: 18 patients with BS-CP participated; age 11.5 (mean, range: 5.0-21.8) years, body weight 36.4 (15.0-72.0) kg. GMFCS levels I-IV were: n = 4; 5; 8; 1. There was no significant difference comparing V1 and V2. GMFM 66 (total +2.5 points, Dimension D +3.8 and E +3.2) and COPM (Performance +2.1 points, Satisfaction +1.8 points) showed statistically significant improvements for V3 or V4 compared to V1 or V2 representing clinically meaningful effect sizes. Age, GMFCS level, and repeated ROBERT blocks correlated negatively with GMFM improvement, but not with COPM improvement. INTERPRETATION: Following ROBERT, this prospective controlled cohort study showed significant and clinically meaningful improvements of function in ICF domains of "activity" and "participation" in patients with BS-CP. Further assessment in a larger cohort is necessary to allow more specific definition of factors that influence responsiveness to ROBERT program.