function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bitner, Maria Aleksandra', 1],
    ['Bitner, Maria Aleksandra & Logan, Alan', 2],
    ['Dall, William Healey', 3],
    ['Foster, William J. & Danise, Silvia & Twitchett, Richard J.', 2],
    ['Mead, A. & Carlton, J. T. & Griffiths, C. L. & Rius, M.', 1],
    ['Schemm-Gregory, Mena & Henriques, Maria Helena', 1],
    ['Stenzel, Henryk Bronislaw', 1],
    ['Tasso, Vicente & El Haddad, Mustapha & Assadi, Carolina', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    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);