function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Börner, Carl', 1],
    ['Condé, Bruno', 1],
    ['Foster, William J. & Danise, Silvia & Twitchett, Richard J.', 1],
    ['Grassi, B. & Calandruccio, S.', 1],
    ['Hansen, Hans Jacob', 4],
    ['Hausmann, Imelda M. & Nützel, Alexander & Roden, Vanessa Julie', 1],
    ['Hryniewicz, Krzysztof & Amano, Kazutaka', 2],
    ['Hryniewicz, Krzysztof & Little, Crispin T. S.', 3],
    ['Kiel, Steffen & Hybertsen, Frida & Hyžný, Matúš', 2],
    ['Negri, Mauro Pietro & Corselli, Cesare', 1],
    ['Petit, Richard E.', 1],
    ['Rucker, A.', 3],
    ['Silvestri, Filippo', 2],
    ['Smith, Edgar A.', 5],
    ['Suarez-Mozo, Nancy Yolimar & Gracia, Adriana', 2],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);