function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahmad, J.', 1],
    ['Amato, J. F. R', 1],
    ['Baeva, O. M.', 2],
    ['Bartoli, Pierre & Overstreet, Robin M. & Gibson, David Ian', 1],
    ['Brooks, Daniel R. & Overstreet, Robin M.', 2],
    ['Gu, Chang-dong & Shen, J. - w.', 3],
    ['Hopkins, Sewell H.', 2],
    ['Linton, E.', 6],
    ['Manter, Harold W.', 2],
    ['Schell, Stewart C.', 2],
    ['Stossich, M.', 3],
    ['Tubangui, Marcos A. & Masiluñgan, Victoria A.', 2],
    ['Van Beneden, Pierre-Joseph', 2],
    ['Wang, P. - q.', 2],
    ['Yamaguti, S.', 3],
    ['Other (27)', 27]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=61)',
    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);