function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ardila-Camacho, Adrian & García, Alexander', 3],
    ['Baranov, Viktor & Perez-de la Fuente, Ricardo', 1],
    ['Canbulat, Savaş', 2],
    ['El-Hawagry, Magdi S. & Sharaf, Mostafa R. & Al Dhafer, Hathal M.', 1],
    ['Hassan, Muhammad Asghar & Oswald, John D. & Zia, Ahmed', 3],
    ['Howarth, Brigitte & Gillett, Michael', 1],
    ['Illiger, Johann Karl Wilhelm', 1],
    ['Kaur, Simarjit & Pandher, Manpreet Singh & Chandra, Kailash', 5],
    ['Makarkin, V. N. & Solodovnikov, A. Yu. & Shchurov, V. I.', 1],
    ['Monserrat, Victor J.', 1],
    ['Snyman, Louwrens P. & Sole, Catherine L. & Ohl, Michael', 1],
    ['Snyman, Louwtjie P. & Ohl, Michael & Mansell, Mervyn W.', 1],
    ['Walker, Francis', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);