function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Artmann-Graf, Georg', 1],
    ['Broad, Gavin R.', 38],
    ['Ghahari, H. & Jussila, R.', 4],
    ['Ghahari, H. & Jussila, R. & I, Northwestern', 2],
    ['Ghahari, H. & Schwarz, M.', 1],
    ['Ghahari, Hassan & Jussila, Reijo', 2],
    ['Horstmann, K.', 4],
    ['Kolarov, J.', 9],
    ['M. F & Kirtay, H. & Birol, O.', 4],
    ['M. F & M. Y & Buncukçu, A.', 4],
    ['Riedel & Pénigot & Schwarz & Diller & Johansson & Japoshvili, G.', 4],
    ['Riedel, Matthias & Diller, Erich & Japoshvili, George', 2],
    ['Yurtcan, M. & Kolarov, J. & Beyarslan, A.', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=80)',
    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);