function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Araújo, Marcel Santos De & Feres, Reinaldo José Fazzio', 1],
    ['Ballari, Maria Celeste & de Quinteros, Sara L. Quintana', 1],
    ['Flechtmann, C. H. W. & Arana, M. & Ciarrocchi, F.', 1],
    ['Flechtmann, Carlos H. W. & De, Gilberto J. & Moraes', 1],
    ['Han, Xiao & Zuo, Yun & Xue, Xiao-Feng & Hong, Xiao-Yue', 1],
    ['Kadono, Fujio & Takei, Madoka & Gotoh, Tetsuo & Kubota, Kenji', 1],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 3],
    ['Lotfollahi, Parisa & de Lillo, Enrico', 1],
    ['Song, Zi-Wei & Xue, Xiao-Feng & Hong, Xiao-Yue', 1],
    ['Wang, Guoquan & Wei, Suigai & Yang, Ding', 1],
    ['Wei, Suigai & Wang, Guoquan & Qin, Aizhi', 1],
    ['XUE, XIAO-FENG & GUO, JING-FENG & HONG, XIAO-YUE', 4],
    ['Xue, Xiao-Feng & Zhang, Zhi-Qiang', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);