function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anderson, R. Charles & Adam, M. Shiham & Cheng, Lanna', 4],
    ['Canejo, Rafael P. R. & Melo, Alan Lane De', 1],
    ['Damgaard, Jakob & Moreira, Felipe Ferraz Figueiredo', 3],
    ['Ghahari, Hassan & Moulet, Pierre & Ostovan, Hadi', 1],
    ['Kment, Petr & Carapezza, Attilio', 2],
    ['Moreira, Felipe Ferraz Figueiredo & Barbosa, Julianna Freires', 1],
    ['Pacheco-Chaves, Bernald & Cordeiro, Isabelle Da Rocha Silva', 2],
    ['Riviaux, Senén Muñoz & Moreira, Felipe Ferraz Figueiredo', 1],
    ['Samuel, Amos Shem', 1],
    ['Usinger, Robert L.', 1],
    ['V, Clister & Zettel, Herbert', 1],
    ['White, Francis Buchanan', 5],
    ['Zettel, Herbert & Tran, A. D.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    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);