function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alessandri, G. De', 2],
    ['Buckeridge, John S.', 5],
    ['Carriol, René-Pierre', 2],
    ['Chan, Benny K. K. & Cheang, Chi Chiu', 3],
    ['Chan, Benny Kwok Kan & Hsu, Chih-Hsiung & Tsai, Pei-Chen', 2],
    ['Darwin, Charles Robert', 9],
    ['Foster, B. a.', 2],
    ['Gomez-Daglio, Liza & Syoc, Robert Van', 2],
    ['Hiro, F.', 2],
    ['Kolosvary, G.', 4],
    ['Nilsson-Cantell, C. a.', 7],
    ['Pilsbry, Henry A.', 6],
    ['Pitriana, Pipit & Valente, Luis & von Rintelen, Thomas', 8],
    ['Pochai, Ashitapol & Kingtong, Sutin & Sukparangsi, Woranop', 6],
    ['Sukparangsi, Woranop & Pochai, Ashitapol', 4],
    ['Other (15)', 17]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=81)',
    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);