function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bribiesca-Contreras, Guadalupe & Dahlgren, Thomas G.', 2],
    ['Fassbender, Nico & Stefanoudis, Paris V', 1],
    ['Gray, J. E.', 1],
    ['Moser, Julia & Moraes, Fernando C. & Castello-Branco, Cristiana', 3],
    ['Reiswig, Henry M.', 2],
    ['Reiswig, Henry M. & Araya, Juan Francisco', 4],
    ['Tabachnick, Konstantin & Fromont, Jane & Ehrlich, Hermann', 1],
    ['Tabachnick, Konstantin R.', 3],
    ['Van, Rob W. M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);