function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Assing, Volker', 2],
    ['Assing, Volker & Brachat, Volker & Meybohm, Heinrich', 1],
    ['Assing, Volker & Schülke, Michael', 1],
    ['Assing, Volker & Schülke, Michael & Brachat, Volker', 2],
    ['Bekchiev, Rostislav & Hlaváč, Peter', 7],
    ['Broun, Thomas', 1],
    ['Chandler, Donald S. & Sabella, Giorgio & Bückle, Christoph', 1],
    ['Choi, Yeon-Jae & Park, Sun-Jae & Lee, Seung-Gyu', 7],
    ['Hlaváč, Peter', 6],
    ['King, R. L.', 2],
    ['Kolimár, Robert & Hlaváč, Peter & Baňař, Petr', 2],
    ['Löbl, Ivan & Kurbatov, Serguei A. & Nomura, Shûhei Dr.', 21],
    ['Navarrete-Heredia, José Luis & Gómez-Rodríguez, Cecilia', 11],
    ['Newton, Alfred F.', 2],
    ['Poggi, Roberto', 2],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=74)',
    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);