function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Borowiec, Marek L.', 1],
    ['Borowiec, Marek L. & Longino, John T.', 3],
    ['Delsinne, Thibaut & Sonet, Gontran & Donoso, David A.', 4],
    ['Donoso, D. A. & Vieira, J. M. & Wild, A. L.', 5],
    ['Joe A. Macgown & Terence L. Schiefer & Michael G. Branstetter', 1],
    ['Longino, J. T.', 1],
    ['Macgown, Joe A. & Schiefer, Terence L. & Branstetter, Michael G.', 2],
    ['Silva, R. R. & Feitosa, R. M. & Brandão, C. R. F.', 1],
    ['Ward, P. S.', 1],
    ['Ward, Philip S. & Brady, Seán G.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);