function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ahl, E.', 1],
    ['Angulo, Arturo', 2],
    ['Chan, Jeffery C. F. & Tsang, Alphonse H. F. & Yau, Sze-man', 3],
    ['Eagderi, Soheil & Mouludi-Saleh, Atta & Esmaeili, Hamid Reza', 1],
    ['Esmaeili, Hamid Reza & Hamidan, Neshat', 1],
    ['Heckel, J. J.', 3],
    ['Hubbs, Carl L. & Gordon, M.', 1],
    ['Hui, Tan Heok & Peng, Kelvin Lim Kok & Huan, Liew Jia', 3],
    ['Jordan, David Starr & Evermann, Barton Warren', 1],
    ['Jordan, David Starr & Snyder, John Otterbein', 1],
    ['KALLMAN, KLAUS D. & WALTER, RONALD B. & MORIZOT, DONALD C.', 1],
    ['Kallman, K. D. & Walter, R. B. & Morizot, D. C. & Kazianis, S.', 2],
    ['Kner, R.', 1],
    ['Meyer, M. K. & Schartl, M.', 2],
    ['Rauchenberger, M. & Kallman, K. D. & Morizot, D. C.', 3],
    ['Other (7)', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=33)',
    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);