function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Angulo, Arturo', 2],
    ['Armbruster, Jonathan W. & Page, Lawrence M.', 2],
    ['Chan, Jeffery C. F. & Tsang, Alphonse H. F. & Yau, Sze-man', 2],
    ['Eigenmann, C. H. & Kennedy, C. H.', 1],
    ['Esmaeili, Hamid Reza & Hamidan, Neshat', 1],
    ['Hui, Tan Heok & Peng, Kelvin Lim Kok & Huan, Liew Jia', 3],
    ['Joel M. Chavez & Reynaldo M. de la Paz & Surya Krishna Manohar', 1],
    ['Lardizabal, Claudia C. & Benitez, Edis M.', 1],
    ['Ng, Casey Keat Chuan & Lim, Teow Yeong & Ahmad, Amirrudin', 1],
    ['Ota, Renata Rúbia & Deprá, Gabriel de Carvalho', 1],
    ['Smith, Welber Senteio & Halcsik, Leticia', 1],
    ['Weber, C.', 1],
    ['Çiçek, Erdoğan & Fricke, Ronald & Sungur, Sevil', 2],
    ['Çiçek, Erdoğan & Jawad, Laith & Eagderi, Soheil', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);