function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Coscarón, María Del Carmen', 1],
    ['Dursun, Ahmet & Fent, Meral', 3],
    ['Guilbert, Eric', 11],
    ['Guilbert, Eric & Guidoti, Marcus', 4],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 9],
    ['Ishikawa, Tadashi & Saito, Masayuki U. & Kishimoto-Yamada, Keiko', 8],
    ['Kment, P.', 1],
    ['Kment, Petr & Jindra, Zdeněk', 2],
    ['Knudson, Alexander H. & Rider, David A. & Knodel, Janet J.', 8],
    ['Montemayor, I. & Linnavuori, E.', 1],
    ['Montemayor, Sara & Coscarón, María Del Carmen', 1],
    ['Souma, Jun', 11],
    ['Tezcan, S. & Gulpercin, N. & Fent, M.', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=62)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);