function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Handal, Adil Y. & Torstensson, Anders & Wulff, Angela', 4],
    ['Bahls, Loren', 2],
    ['Chudaev, Dmitry & Jüttner, Ingrid & Levkov, Zlatko', 3],
    ['Ferreira da Silva, Juliana & Oliveira, Maria Angélica', 6],
    ['Grizancic, Lana & Baricevic, Ana & Smodlaka Tankovic, Mirta', 1],
    ['Joh, Gyeongje', 6],
    ['Kulikovskiy, Maxim S. & Chudaev, Dmitry A.', 2],
    ['Levkov, Zlatko & Williams, David M.', 1],
    ['Novis, Phil M. & Braidwood, Jasmine & Kilroy, Cathy', 2],
    ['Vijver, Bart Van De', 1],
    ['Xiao, Qiao-Zhi & Guo, Ji-Shu & Tang, Zheng-Bin', 1],
    ['Yilmaz, Elif & Mann, David G. & Gastineau, Romain', 1],
    ['Zhang, Yu & Guo, Ji-Shu & Kociolek, John Patrick & Li, Yan-Ling', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    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);