function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aguilar-Cano, José & Guzmán-Guzmán, Santiago', 2],
    ['Dančák, Martin & Hroneš, Michal & Sochor, Michal', 1],
    ['Engels, Mathias Erich & Muscat, Edelcio', 1],
    ['Guzmán-Guzmán, Santiago & Plata-Torres, Angelo', 2],
    ['Hroneš, Michal', 1],
    ['Li, Hong-Qing & Bi, Yu-Ke', 1],
    ['Mar, Shek Shing & Saunders, Richard M. K.', 1],
    ['Nuraliev, Maxim S. & Beer, Anton S. & Kuznetsov, Andrey N.', 2],
    ['Pankaj Kumar & Stephan W. Gale & Ji-Hong Li', 1],
    ['Silva, Die- -- Go Fe- -- Rre- -- Ira Da', 2],
    ['Silva, Diego Ferreira Da & Braga, João Marcelo Alvarenga', 1],
    ['Silva, Diego Ferreira Da & Honório, Mayk', 2],
    ['Silva, Diego Ferreira Da & Ríos, Román Carlos', 1],
    ['Siti-Munirah, Mat Yunoh & Dome, Nikong', 2],
    ['Yunoh, Siti-Munirah Mat & Nikong, Dome', 3],
    ['Other (4)', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    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);