function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abotsi, Komla Elikplim & Kokou, Kouami & Dubuisson, Jean-Yves', 2],
    ['Alderwerelt van Rosenburgh, Capt. C. R. W. K.', 3],
    ['Almeida, Thais Elias & Salino, Alexandre', 2],
    ['Beljaev, Еvgeniy A. & Titova, Olga L.', 1],
    ['Brause, Guido Georg Wilhelm', 2],
    ['Carmes, Amanda Angélica & Dechoum, Michele de Sá', 1],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 2],
    ['Christenhusz, Maarten J. M. & Zhang, Xian-Chun', 1],
    ['Hooker, William Jackson & Baker, John Gilbert', 1],
    ['Janssen, Thomas & Rakotondrainibe, France', 1],
    ['Rajapaksha, Ranil', 2],
    ['Reyes-Chávez, Johan & Tarvin, Stephanie & Batke, Sven Peter', 2],
    ['Rosenstock, Eduard', 1],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 1],
    ['Tryon, Henry', 2],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    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);