function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Angulo, Arturo', 2],
    ['Angulo, Arturo & Betts, Joel T. & González-Alemán, Néstor J.', 2],
    ['Arai, Hisao P. & Smith, John W.', 1],
    ['Bleeker, Pieter', 1],
    ['Brito, Paulo M. & Alvarado-Ortega, Jésus & Meunier, François J.', 1],
    ['Cantalice, Kleyton Magno & Martinez-Melo, Alejandra', 2],
    ['Chan, Jeffery C. F. & Tsang, Alphonse H. F. & Yau, Sze-man', 2],
    ['Cope, Edward Drinker', 3],
    ['Eagderi, Soheil & Mouludi-Saleh, Atta & Esmaeili, Hamid Reza', 1],
    ['Ebersole, Jun A. & Cicimurri, David J. & Stringer, Gary L.', 1],
    ['Fowler, Henry Weed', 1],
    ['Gill, T. N.', 1],
    ['Girard, Charles Frédéric', 3],
    ['Hui, Tan Heok & Peng, Kelvin Lim Kok & Huan, Liew Jia', 2],
    ['Laan, Richard Van Der', 1],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    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);