function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barbar, Ziad & Parker, Bruce L. & Skinner, Margaret', 2],
    ['Halliday, R. B.', 1],
    ['Kamran, Muhammad & Alatawi, Fahad J.', 1],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 1],
    ['Mąkol, Joanna & Arijs, Yves & Wäckers, Felix', 2],
    ['Noei, Javad & Ersin, Firdevs & Çakmak, İbrahim', 1],
    ['Saboori, Alireza & Shirvani, Zeinab', 3],
    ['Stalstedt, Jeanette & Laydanowicz, Joanna & Lehtinen, Pekka T', 3],
    ['Willmann, C.', 9],
    ['Xu, Si-Yuan & Zhang, Zhi-Qiang', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);