function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baehr, Martin', 3],
    ['Baehr, Martin & Reid, Chris A. M.', 3],
    ['Britton, Everard B.', 13],
    ['Larochelle & Larivière, Marie-Claude & Larochelle & Larivière', 2],
    ['Liebherr, James K.', 384],
    ['Liebherr, James K. & Krushelnycky, Paul D.', 1],
    ['Liebherr, James K. & Marris, John W. M. Mr.', 4],
    ['Perrault, G. G.', 62]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=472)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);