function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Broch, H.', 1],
    ['Brunnich Nielson, K.', 1],
    ['Buckeridge, John S. & Jagt, John W. M. & Speijer, Robert P.', 1],
    ['Darwin, Charles Robert', 2],
    ['Foster, B. a. & Buckeridge, John S.', 2],
    ['Gruvel, A.', 7],
    ['Gruvel, J. a.', 2],
    ['Hoek, Paulus Peronius Cato', 6],
    ['Perreault, Ray T. & Buckeridge, John S.', 6],
    ['Pilsbry, Henry A.', 19],
    ['Seguenza, G.', 6],
    ['Sheng, Mao-Ling & Sun, Shu-Ping & Wang, Xi-Nan & Wu, Hai-Wei', 2],
    ['Stubbings, H. G.', 3],
    ['Young, Paulo S.', 6],
    ['Zevina, G. B.', 4],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=75)',
    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);