function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brook, George', 3],
    ['Chimienti, Giovanni & Terraneo, Tullia Isotta & Vicario, Silvia', 1],
    ['Fassbender, Nico & Stefanoudis, Paris V', 1],
    ['Gerdes, Klaas & Kihara, Terue Cristina & Martinez Arbizu, Pedro', 3],
    ['Horowitz, Jeremy & Opresko, Dennis M. & Bridge, Tom C. L.', 1],
    ['Lima, Manuela M. & Cordeiro, Ralf T. S. & Perez, Carlos D.', 4],
    ['Lü, Ting & Zhan, Zifeng & Li, Yang & Xu, Kuidong', 2],
    ['Opresko, Dennis M.', 1],
    ['Opresko, Dennis M. & Molodtsova, Tina N.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);