function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Appolloni, Massimo & Smriglio, Carlo & Amati, Bruno', 1],
    ['Ashmead, William Harris', 1],
    ['Blackburn, Thomas & Cameron, P.', 1],
    ['Blainville, H. M. D. de', 1],
    ['Cameron, P.', 2],
    ['Cresson, E. T.', 1],
    ['Fassio, Giulia & Stefani, Matteo & Russini, Valeria', 15],
    ['Galsworthy, Anthony & Shaw, Mark R. & Haraldseide, Håkon', 1],
    ['Montagu, George', 1],
    ['Simone, Luiz Ricardo L. & Cunha, Carlo M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);