function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fischthal, Jacob H. & Kuntz, Robert E', 1],
    ['Kobayashi, Harujiro', 1],
    ['Linton, E.', 2],
    ['Looss, A.', 5],
    ['Muniz-Pereira, Luís C. & Vieira, Fabiano M. & Luque, José L.', 7],
    ['Paredes-León, Ricardo & García-Prieto, Luis', 8],
    ['Pinto, Hudson Alves & Melo, Alan Lane De', 1],
    ['Siddiqi, Ather H. & Cable, Raymond M.', 2],
    ['Vigueras, I. P.', 2],
    ['Xue, Xiao-Feng & Song, Zi-Wei & Hong, Xiao-Yue', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);