function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alessandri, G. De', 2],
    ['Brunnich Nielson, K.', 1],
    ['Collins, J. S. H.', 1],
    ['Conrad, Timothy Abbot', 1],
    ['Darwin, Charles Robert', 8],
    ['Fernandes, Joana N. & Cruz, Teresa & Syoc, Robert Van', 1],
    ['Fernandes, Joana N. & Cruz, Teresa & van Syoc, Robert', 1],
    ['Geinitz, Hans Bruno', 1],
    ['Hutton, F. W.', 1],
    ['Jagt, John W. M. & Zonova, Tatiana D. & Jagt-Yazykova, Elena A.', 9],
    ['Moore, Charles', 2],
    ['Morris, John', 2],
    ['Sowerby, James DeCarle', 4],
    ['Steenstrup, Johannes Japetus Smith', 6],
    ['Woodward, H.', 2],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    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);