function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Albano, Paolo G. & Steger, Jan & Bakker, Piet A. J.', 1],
    ['Appolloni, Massimo & Smriglio, Carlo & Amati, Bruno', 6],
    ['Blake, Joseph (Rev.)', 5],
    ['Born, Ignaz von', 1],
    ['Conrad, Timothy Abbot', 5],
    ['Defrance, Jacques Louis Marin', 1],
    ['Goto, Michiharu', 1],
    ['Koppka, Jens', 6],
    ['Leal, José H.', 1],
    ['Lightfoot, John', 1],
    ['Linnaeus, Carolus', 9],
    ['Logan, W. N.', 6],
    ['Moore, Charles', 3],
    ['Röding, Peter Friedrich', 4],
    ['Sowerby, James DeCarle', 3],
    ['Other (3)', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    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);